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Science Newsletters
The IFAVA newsletter provides members with access to credible, sound scientific evidence specific to vegetables and fruit. An undertaking of this kind cannot be accomplished without the generous
support of many who have contributed to the development and review of the content. As the first Chair of IFAVA, I would like to personally thank all those who have been active in the development of this new tool, to spread the valuable message of eating vegetables and fruit. I would specifically like to thank the scientific committee and editorial board for their vision and commitment on this program.
Ron Lemaire
Executive Vice President & Director of Marketing
Canadian Produce Marketing Association
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Fruit and Vegetable Consumption - Determinants among Adolescents
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Adolescents have to engage with a social environment of increasing
complexity and diversity. The agents in this engagement include
family and peer relationships, the internet, television, mobile phones, the media and electronic gadgetry. All of these provide a flow of information that influences adolescents’ perception of their size and shape, self-esteem, fashions and ways of behaving (including dietary choices, skipping meals, eating fruits and vegetables and fast foods). In order to implement public health policies that are effective against adolescent overweight and obesity (and which contribute to health in other ways), it seems essential to obtain a picture of the relationship between the social environment, frequency of obesity and key dietary variables.
Recent surveys have been based on large numbers of adolescents
ranging in age from 11 to 17 years. In the largest study – of more
than 162 thousand adolescents in 35 countries - there were some
surprises. For example, the relationship between the percentage of
overweight/obese adolescents and economic inequality – or the social gradient (differences in wealth between top and bottom) – was different for the high income countries compared with those of middle income. Why should this be? Clearly social dynamics operate differently in distinct cultures and in countries which vary in wealth. The sheer complexity of the relationship between country based economics and adolescent obesity is mirrored by the complexity of the relationships between family circumstances and adolescent dietary behaviours. These outcomes raise the question of whether it is possible to draw a single all embracing conclusion from such complicated arenas. Although large surveys have value, they may not provide the elements for policy development. We can ask, is there an average adolescent? Answer – No! Consequently we are unlikely to find solutions in the ‘average’ values of variables that influence adolescent behaviour and body weight. In dealing with complicated environments where predictability is low, it may be better to do our research locally, and to uncover relationships in the areas where we live and work.
John Blundell
Institute of Psychological Sciences, University of Leeds, UK |
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Living Healthy and Feeling Better
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How far do we have to go back? As the articles in this newsletter highlight, we are now confronting challenges affecting all our different sectors in the food chain, in nutrition and health. In the more affluent parts of Europe, life expectancy is going up by three months every year - reflecting not only how we live now and our better management of disease, but also our biological responses to this generation's early feeding practices. In growing up we were much thinner than today's children and had a very different diet and level of physical activity. Now healthy living is becoming one of the top issues not only for politicians but also doctors. The whole issue of climate change is being negotiated with huge implications for the food chain and as we foresee the re-negotiation of the Common Agricultural Policy in the European Union. As illustrated in the articles below we have to confront not only the challenge of ageing but also of the diseases which affect us a long time before we finally die. Life expectancy can differ even within a single European country by 10 years, with the poor dying earlier yet living within a kilometre or two of their wealthy neighbours. They also have up to 20 years less of a disability and disease free life; and diet is increasingly seen to play an exceptionally important part. Clearly we need to rethink the importance of the Mediterranean diet and some are even considering the Palaeolithic diet which probably had even more fruit and vegetables.
W Philip T James
London School of Hygiene and Tropical Medicine, UK
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The Gap Between Recommendations and Real Consumption (In Europe)
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An adequate consumption of Fruits and Vegetables (F&V) is an important component of a healthy diet to prevent major non-communicable diseases such as cardiovascular diseases, diabetes, gastrointestinal cancer and obesity. The recently published European nutrition and health report 2009 indicates that a minimum daily intake of 400g of F&V (excluding potatoes and other starchy tubers), which is the minimum amount recommended by the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO), has not been achieved in many European Union countries. Data from dietary surveys carried out in the adult population suggest that Austria, Germany, Italy and Poland only have been able to meet this recommendation. The FAO food balance sheets present a comprehensive picture of the pattern of a country’s food supply during a specified reference period and show the quantities and types of food available in a country. Although an increase has been observed in the mean supply of F&V over the past years, in almost two thirds of the 53 Member States in the WHO European Region their mean supply is far below the recommended supply of 600g per capita per day. The second action area of the WHO European Action Plan for Food and Nutrition Policy 2007-2012 is entitled ensuring a safe, healthy and sustainable food supply. Member States are encouraged to take integrated action in this area in order to improve the availability and affordability of F&V by revising, for instance, their agricultural policies; providing technical advice and market incentives for local horticulture (including urban horticulture) and reducing trade barriers to imports. A preliminary analysis of currently available national policy documents, carried out by the WHO Regional Office for Europe, suggest that nine documents only include an objective to increase the production and growing of F&V. In contrast, campaigns targeting the availability of F&V in local settings such as schools or work places have been widely implemented as well as initiatives aiming to improve the individual consumption. These campaigns and initiatives are promising in reducing the gap between recommendations and real consumption of F&V in Europe, but many countries still need to take action in this regard.
Trudy Wijnhoven
Technical Officer, Nutrition Surveillance
WHO Regional Office for Europe |
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The Perception of Fruit and Vegetables
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For several years, most governments have been announcing policies exhorting people to eat a healthy diet (around the iconic images of fruits and vegetables (F&V)) and to undertake more physical activity in order to help prevent a range of diseases. Eat less unhealthy foods and move more. Almost everyone agrees that it makes sense; no one is actually advocating eating fewer F&V or to move less. However, the percentage of people in most societies who ‘claim’ to meet prescribed targets is depressingly low (the true figure may be even lower than ‘claimed’). Why is this? A number of studies are now being conducted to reveal why people
– both adults and children – are unable to meet the quite reasonable and not especially demanding targets being set. Barriers exist both in the individual and in the environment. For young children their parents apparently present significant barriers (the corollary is that the parents could therefore be a positive influence). But parents have perceptions of the barriers they themselves confront, one of which is the perceived pressure of time. In a modern world people blame a lack of time for being unable to eat a healthy, balanced diet. Can anything be done about these barriers? One problem is there are abundant alternatives to a healthy diet and living a physically active life. These alternatives are not marketed as ‘unhealthy practices’ but they are incorporated into cultural forces that promote the consumption of easy to find, cheap to buy, energy dense products and enjoyable sedentary activities (often sitting down watching someone else do something). All of these are legitimised in the commercial market of a consumer society. It may be perceived as being unfair but it is not against the law. In this environment, does the identification of barriers exhaust all possibilities for the failure of people to meet targets? Could there be an underlying ‘unwillingness’? Is it possible that people actually
enjoy the taste and easy mouthfeel of ‘unhealthy’ foods or that they dislike the effort of physical activity? Self denial is not a popular lifestyle choice. The preservation of ‘freedom of choice’ is a goal of most democratic societies. However, to change unhealthy lifestyles may require a greater degree of coercion (limitation of choice) than currently exists.
Pr John Blundell
Director of the Institute of Psychological Sciences
University of Leeds, UK |
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Health Benefits of Allium Vegetable Intakes
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There is little doubt that nutrition and health are intimately intertwined. For generations, people have believed that foods can do more than merely provide energy and nutrients for growth and development and thus contribute to overall health and disease prevention. Beliefs about the medicinal properties of foods have been highlighted in a number of the early writings. Hippocrates is frequently quoted to proclaim “Let food be thy medicine and medicine be thy food.” Today, statements about the ability
of foods and food components to reduce disease risks or enhance the quality of life are relatively commonplace and continue to captivate our lives. Garlic and other allium foods (onions, leeks, chives, etc.) are commonly consumed foods which are often revered for their potential medicinal properties. This reverence has been promoted in recent years, especially for garlic, because of the emergence of data revealing that in addition to antimicrobial properties these foods may reduce human illnesses including
that related to heart disease and cancer. The ability of garlic and its
constituents to assist in maintaining normal immune-competence and possibly improve mental function suggests it, and possibly other allium foods, may have widespread health implications1, 2. Unfortunately, while the interrelationship between garlic intake and health are intriguing, there remain a dearth of well-controlled clinical investigations with allium foods and the data that exist is often inconsistent. The current series of articles point to the potential benefits of garlic, and onions, in several health related
conditions. The articles also provide evidence that it would be unwise, and inappropriate, to assume that all individuals will respond identically, if at all.
J. A. Milner, Nutritional Science Research Group, Division of Cancer Prevention, National Cancer Institute, Rockville, MD, USA
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Children Nutritional Needs: School Meals or Packed Lunches?
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Low consumption of fruit and vegetables (F&V) is a worrying
phenomenon among children. According to the Pro-Children study
financed by the European Commission, in average only 17.6% of
the 11-year-old children reach the WHO minimum recommended
level of 400g/day.
One of the reasons of low F&V consumption by children is their
apparent lack of availability. According to the same study, only
22% of children reported good availability at school and during
leisure-time activities.
Improving the eating habits of children and adolescents is an
important strategy for improving public health. Increased F&V
consumption can have an immediate effect on maintaining a
healthy body weight and reducing the risk of certain diseases over
the longer term. Interventions targeting healthy nutrition need to
occur early in childhood or during adolescence, in order to prevent
or reverse the adverse health effects of overweight and poor
eating habits.
This highlights the importance of ensuring an appropriate
availability of F&V at school. Schools can reach almost all children
and adolescents during their first decades of life and are a critical
part of the social environment that shape young people's behavior.
The European school fruit scheme with an annual budget of €90
million should generate positive effects and bring benefits to
schoolchildren, their parents and teachers as regards increased
availability of F&V.
Lars Hoelgaard
Deputy Director General, European Commission, Belgium
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Fruit and Vegetables in the World
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The World Health Report 2003 published by WHO highlighted that low fruit and vegetable intake is among the top 10 risk factors for disease prevention. If this is not enough to focus attention then the fact that an estimated 2.7 million lives could be saved annually with sufficient levels of fruit and vegetable consumption certainly should. But does it?
The fact is that wherever you live in the world a range of factors are impacting on your health. Modern lifestyles and eating habits, more sedentary jobs, changed working environments and a range of other factors have all combined to place each of us more at risk of chronic disease. Consuming the recommended levels of fruit and vegetables is a relatively simple and effective way of helping to reduce the impact of a wide range of serious – and largely preventable – health problems throughout the world. Through activities such as this newsletter, the International Fruit & Vegetable Alliance is actively involved in encouraging efforts to increase the consumption of fruit and vegetables globally for better health. While the science linking increased consumption to better health outcomes provides a strong foundation for action, there is no doubt that we need to better understand current consumption patterns and examine ways to effect behavioral change in order to make a long term difference. The articles presented in this edition of the newsletter reflect this need to appreciate why consumption of fruit and vegetables is not more in line with the potential health benefits. If parents, doctors, public and private health practitioners, grower organizations, governments and other bodies are all convinced of the substantial health credentials, the question remains as to why consumption is not higher. Understanding the motivating factors for consumers is a critical part of this important health puzzle.
Chris Rowley - IFAVA Co-Chair & Horticulture Australia Limited Health Initiative Coordinator
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Close Environment Impact on F&V Consumption
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Why do so few people eat healthy diets?
Most people do not meet national dietary guidelines. A UK national
survey in 2001 showed how many people met each nutrition
target but left out a crucial piece of information: how many met all
the targets at once - i.e. ate a healthy diet? The answer was barely
one percent.
Despite repeated surveys, researchers and policy-makers struggle
to find the answers. Does income really matter? Is education more
important? Or local food supplies - 'food deserts'? Would extra cash
make a difference?
The traditional approach sees individual behaviour as the problem
and seeks to change it. But behaviour change depends on a
sequence of changes: changes in information, of attitudes, in
motivation, changes in skills and resources, access and availability,
changes in social norms and cultural expectations. Purchases are
strongly influenced by what is available, by price, by past
experience and by marketing messages.
New research described in this Newsletter throws further light on
what infuences behaviour. Parents, even on low incomes, know the
basics of healthy eating but not always the detail. A TV in the
bedroom undermines healthy eating patterns. Family meals help,
but not a lot.
These findings show the complexity of dietary behaviour.
Interventions which tackle only part of the problem will probably
fail. Real change - at the level of agricultural policy, prices and
marketing - is needed if we really want to help all people meet
the healthy targets.
Tim Lobstein
Director of Policy and Programmes
IASO - IOTF - UK |
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How to improve F&V consumption at School?
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Growing evidence has shown that low consumption of fruits and
vegetables (F&V) is associated with the risk of some chronic
diseases, particularly obesity. Prevention efforts need to include
early interventions to increase F&V consumption of children.
Several international studies have shown that school intervention
early in childhood is of major importance and that both school and
home play a complementary role. So, the question becomes “how
to make the consumption of F&V increase in schools ?”
International initiatives have been developed and have concerned
3 types of experiences:
1. Increasing F&V availability in canteens, like the "Farm to school"
program in Michigan, or with vending machines;
2. Organizing gardening activities at school;
3. Offering a fruit or a vegetable for snack, experiences followed in
Denmark and Norway. In 2008, this was one of the priority areas of
the public health policies of the French Ministry of Agriculture, with
the program "un fruit pour la recré" (“a fruit for recreation time”).
This type of program will spread all over the European countries by
the end of 2009 with the School Fruit and Vegetable Scheme. The
purpose is not only to improve children's knowledge, but also to
change habits and behaviors.
Martine Padilla
Scientific administrator, CIHEAM-IAMM, UMR Moisa. |
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How F&V could be beneficial for health?
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A high intake of fruits and vegetables (F&V) is a strong
determinant of health and results in a low risk for cardiovascular
diseases and some forms of cancer. Scientific evidence supporting
the health benefits of F&V is primarily derived from
epidemiological studies. What is missing is a profound
understanding of the bioactive constituents in F&V, the underlying
mechanisms, and the dose-response relationship. The articles
introduced in this Ifava Newsletter further enhance our
understanding of why F&V are so healthy.
Liu et al. investigate the contribution of fruits to the overall intake
of antioxidants. Their data suggest that some fruits are really
“superfruits” due to their high antioxidative potential. Whether
these effects measured in test tubes are still relevant after the
intestinal digestion of fruits, has yet to be studied in humans.
Esmaillzadeh et al. report that a high intake of F&V protects against
non-specific chronic low-grade inflammation. This type of
inflammation occurs in obese subjects and is associated with an
increased risk of cardiovascular diseases. A high F&V intake is also
associated with lower blood pressure. He et al. suggest in their
article that F&V as a major dietary source of potassium contribute
to blood pressure reduction. Together these articles exemplify the
different types of bioactive constituents in F&V. For the consumer,
the maximum health benefit clearly results from a daily intake of
at least 400 grams of various F&V.
Dr. Bernhard Watzl
Max Rubner-Institute, Karlsruhe, Germany |
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From the 2008 WCRF Policy Report
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In 2007 the World Cancer Research Fund (WCRF) and the American
Institute for Cancer Research (AICR) published the Second Expert
Report, Food, Nutrition, Physical Activity and the Prevention of
Cancer: a Global Perspective. This report is the most current and
comprehensive analysis of the literature on diet, physical activity
and cancer. It includes 10 recommendations that comprise a
blueprint people can follow to help reduce their risk of developing
cancer.
But making these recommendations is just the first step. Equally
important is understanding how to achieve them. To this end, a
companion publication to the Second Expert Report, Policy and
Action for Cancer Prevention, addresses why people practice
particular eating and physical activity habits over a lifetime. It
looks at the success of studies that have been designed to change
those behaviours and it makes recommendations for policy-makers
and decision-takers at international, national and local levels.
These recommendations, if implemented, will help influence and
change the lifestyle choices that people make, reducing their risk
of cancer and other chronic diseases. The overarching message of
the Policy Report is that public health is everyone’s business and
that everyone in society has a role to play.
In this issue, we take a look at the methodology behind the Policy
Report, the evidence on the effectiveness of interventions to
increase vegetable and fruit consumption, and at some of the
recommendations and actor groups involved.
Kate Allen
WCRF International
Director (Science & Communications) |
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Community Based Interventions
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Improving healthy nutrition at the workplace:
Why are we so behind in France?
The implementation of Worksite Health Programs in France is the
responsibility of individual employers, as per the national labour law
and as a result of a long social history. This translates as priority to
OSH (Occupational Safety and Health) approach and poorly
developed Workplace Health Promotion. Nutrition is addressed by
occupational practitioners in terms of irregular work hours, for
example people working at night, but is otherwise often absent
from workplace topics. Moreover it is difficult to strike a good
balance between the proposition of nutrition policies in the
workplace and individual freedom regarding dietary behaviours. It is
assumed that people generally wish to eat what they want and do
not appreciate an imposed nutritional message. Nevertheless, there
is clear evidence of the links between lifestyles, including nutrition
habits, working conditions, and ill-health. The current French figures
on F&V point to low consumption. It is well known that price, taste,
and eating habits in the home are determining factors; in the work
place, there is also the issue of where to find fruit and vegetables
and how to keep them.
The ideas of CSR (Corporate Social Responsibility) or Sustainable
Development and work-life balance are increasingly becoming topics
of debate and policy. This is partly in response to the fact that
individuals also are becoming more concerned with their own
health.
Some first examples of positive actions to improve access of F&V in
the workplace include direct services offered to companies, vending
machines which also deliver fruit compotes and fresh fruit, and
nutrition information and education programs led by companies
themselves or by workplace collective catering companies. Times are
changing in response to demand of French consumers for healthier
options, and specifically fresh fruit and vegetables, in the workplace.
Benjamin Sahler
Aract Limousin
Limoges - France |
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University Food Choices
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The three papers in this issue of the Ifava newsletter provide an
interesting perspective on the dietary behaviour of university
students and point to possible explanations and ways of
improving health behaviours. The results in the first paper
regarding a cohort of German students provide further evidence of
the poor lifestyle habits already observed in European student
surveys and national reports published in the last decade. Some
points may be highlighted from this and the two following papers.
Studies based on the university environment draw upon a short
period of life; thus the number of studies is relatively limited.
However, the results consistently demonstrate that university
students are particularly vulnerable to poor health behaviours and
should be taken seriously by public health authorities. It will be
important to conduct studies on the impact of university-based
interventions in terms of academic performance as well as health
and dietary behaviours in later life. Furthermore, it will be
essential to assess whether those traits identified amongst
university students are transitory or persist beyond university life.
Medical students appear to have comparatively (though slightly)
better health behaviours, but whether these are linked to a
stronger health consciousness or rather reflect other explanatory
models deserves scrutiny. Clearly, food offered in university
canteens is a part of the explanation of poor diets amongst
students; improvement in the nutritional quality and price of the
offered meals is a modest, but efficient way to lead to
improvement. Finally, addressing the economic constraints of the
student (and indeed the general) population, and making safe,
healthy foods available and affordable to all must continue to be
a priority, in part because disease prevention through good
nutrition initiatives makes clear economic sense.
Pr Ambroise Martin
University of Lyon - France |
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Carotenoids: Elderly Healthy Diet Marker
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Incidence of cardiovascular disease and cancer increases with
aging. Preventive strategies are of utmost importance for healthy
aging and quality of life. Among them, the reduction in oxidative
damage appears to be an important strategy to reduce cancer
and cardiovascular disease mortality.
Carotenoids are known to be powerful anti-oxidants and may be
good candidates to protect against damage caused by oxidative
stress, since epidemiologic studies suggest that a diet with high
fruit and vegetable intake is protective against cancer and
cardiovascular disease.
Carotenoids (alpha-carotene, beta-carotene, lycopene...) are
present in a wide variety of fruits and vegetables. It is generally
considered that plasma carotenoids are a valid biological marker
for vegetable and fruit intake. Studying the relationship between
plasma carotenoids and mortality may be of great interest,
especially in older adults who are more prone to oxidative stress
and in order to propose dietary guidelines for this population.
Sarcopenia is characterized by a loss of muscle mass, and loss of
strength is a major hallmark for aging. It is also a main component
of frailty and is predictive for disability. Developing strategies to
fight against sarcopenia in the elderly is of utmost importance.
Among various potential mechanisms, oxidative stress that can
damage mitochondrial DNA may be a causal factor for sarcopenia.
Therefore, results of studies developed to determine whether
carotenoid intake may be protective against the decline in muscle
mass and function may provide new perspectives.
Pr Bonnefoy
Department of Geriatric Medicine
Hospital Lyon-Sud (Pierre-Bénite) - France |
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Pregnant Women-A new nutritional risk group without fruit and vegetable consumption?
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PREGNANT WOMEN
A new nutritional risk group without fruit and
vegetable consumption?
Fetal nutrition may influence the subsequent risk of chronic childhood
and adulthood diseases. Unbalanced food intake together with
metabolic changes occurring during pregnancy may influence the
mother’s health by increasing the risk of obesity, which may be risk
factor for metabolic conditions including gestational diabetes mellitus
and hypertension.
Although recommendations for dietary intake and weight during
pregnancy might be vary, several recommend an adequate (400-500
grams) daily intake of fresh fruit and vegetables for whole population.
What a woman eats during pregnancy should cover her nutritional
requirements, facilitate optimum growth of the fetus, prepare the body
for a birth without complications, and contribute to a satisfactory
lactation period. Given that energy intake need only be raised a little
while nutrient intake must be increased much more, it would be
advisable to lower fat and simple carbohydrate intakes and increase
those of fruit, vegetables, greens and legumes. Along with vegetables,
fruits provide antioxidants, especially vitamin C and beta-carotenes,
which are essential during pregnancy. Undoubtedly, unless at least 4 - 5
portions of these foods are taken daily, it is impossible to reach the
folic acid recommendation for pregnant women.
However, not only are proposed dietary guidelines generally not
followed by the population, most women of childbearing age don't
even know they exist. They therefore frequently go through pregnancy
with suboptimall nutritional status. Dietary counselling combined with
the provision of food products during pregnancy is of importance in
modifying food and nutrient intake, with potential health benefits.
Hanna Lagström
Turku Institute for Child and Youth Research
University of Turku - Finlande |
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F&V and Energy Density
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In recent years, policy statements related to obesity have
acknowledged the utility of dietary energy density as a guide to food
choices. The World Health Organization recommends reducing the
energy density of the diet as a strategy to stem the global obesity
epidemic. Reductions in energy density can be achieved by increasing
intake of vegetables and fruits. Their high water content allows people
to eat satisfying amounts of food with few calories per bite. Filling up
at the start of a meal with vegetables or fruit and increasing the
proportion of vegetables in a main course have been found to control
hunger and moderate energy intake. Thus, a number of studies show
that eating vegetables and fruits can lower the energy density of a
meal and this in turn can reduce energy intake.
Can we extrapolate from these short-term studies and promote
increased consumption of vegetables and fruits for weight loss? While
several recent studies support this suggestion, the current body of
evidence is small and the results have been inconsistent. Most studies
of the relationship between vegetable and fruit consumption and
weight status have not assessed the impact on dietary energy density,
and have not controlled for critical variables that could affect intake
such as preparation method, type of fruit or vegetable, timing of
consumption, or whether they are added to the diet or substituted for
other ingredients.
Eating more vegetables and fruits could provide consumers with a
powerful tool to control their weight while improving the quality of
their diets. However, additional strategic investigations of how to use
vegetables and fruits to lower dietary energy density, to enhance
satiety, and to influence energy balance are needed for the
development of effective, evidence-based consumer messages.
Barbara J. Rolls
Center for Childhood Obesity Research,
The Pennsylvania State University, USA |
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Parental Role in Children's Diets
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Currently, preventing childhood obesity is geared to putting a stop to
the intense, unethical drive to commercialise many aspects of
children's lives. Child labour used to be common in Europe and sadly
still is in the developing world, but essentially society has always
focused on the need to protect children. Those who still believe in the
discredited economic system of an unfettered free market model
emphasise the role of parental responsibility, but what can parents do
to cope with the current "obesogenic" or "toxic" environment?
Parents can play a key role in ensuring their child's wellbeing. Prepregnancy
nutrition is now considered to influence fetal growth:
adequate intakes of fruit, vegetables and essential fats, with modest
intakes of animal protein, not only limit congenital defects but affect
the child's long term health. Mothers on a good diet and who breast
feed influence the baby's food preferences; weaning onto fruit and
vegetables establishes long term taste preferences.
The pre-school period is crucial and parents can ensure they establish a
Mediterranean food system at home. Avoid "food choices" because
children are better on a fixed high quality diet until their mid teen-age
years. Nurseries should be regulated to provide high quality foods and
active play.
Parents can also influence the school arrangements for food and
nutrition education, promoting the development of parental contracts
which prohibit in-school confectionary, soft drinks or "junk" food. They
can also promote local community schemes which use the Finnish
model of including vegetables and a salad bar within the cost of main
meals at local restaurants/ canteens. So parents still have an
influential role!
W.P T James
LSHTM & IOTF/IASO, London, UK |
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Fruit and Vegetable Consumption among adolescents
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A healthful diet helps to reduce risk for common health problems among
adolescents and young adults such as hypertension and obesity. Further,
consuming a nutrient-dense diet is critical to support the rapid physical
growth that characterizes adolescence. Eating behaviors established
during these early years often influence diet later in adulthood, and thus
may have an impact on long-term health.
Despite the importance of good nutrition, surveillance data indicate most
youth do not achieve dietary recommendations. There is a great need for
nutrition interventions to address the gaps between current behaviors
and recommendations. This issue describes three examples of research
conducted to inform such interventions:
• Adams and Bahr examined fruit and vegetable intake in college
students and describe the demographic characteristics and other
health behaviors of students with poor intake.
• Dart and Couch evaluated an intervention designed to improve
intakes of fruit, vegetables, and low-fat dairy foods in adolescents
with hypertension.
• Kasparek followed nearly 200 students for six months and examined
the influence of diet and other lifestyle behaviors on weight change
during the transition to college.
The importance of intervening early to promote healthy lifestyle
behaviors in youth is evident. These three studies illustrate the various
types of research that must be completed to better understand what
groups are in greatest need of interventions and what strategies may be
most successful.
Nicole Larson
University of Minnesota, Mineapolis, USA |
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F&V Consumption in low income population
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Forty years ago, Paris witnessed ‘Les Événements’. The startling and
exciting outburst of radicalism involved students, in alliance with trade
unionists, taking to the streets to demand an end to the old
conservative system of inequality and corruption. The elderly President
De Gaulle was so impressed by the intensity of the street violence that
he went briefly into exile. The protesters wanted not only cultural
liberation but also direct participation in government and business. The
revolutionary demands were idealistic, but they failed to win the day.
Shortly after May 1968 the Gaullists were re-elected.
Today, the Paris Conference* and this Newsletter address the theme of
promoting fruit and vegetable consumption. This may be seen, forty
years on, as yet another retreat from the ideals of social solidarity. Such
a view would be too simplistic: indeed, simply wrong. Social
inequalities in health are among the most important consequences of
stratified societies. Large health inequalities persist in rich countries
and, as noted by the ‘Marxists, tendance Groucho’ of 1968, they have
both material and cultural roots. The focus on strategies to increase
fruit and vegetable consumption among people on low incomes is a
sign that industrial interests, reflected by IFAVA, can change in a
progressive way. Distinctly less romantic than university occupations,
but if put into place with creativity and determination, it is likely to do
more for the health of the socially disadvantaged.
Eric Brunner
Reader in Epidemiology and Public Health
University College London, UK |
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F&V Accessibility
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How to support fruit and vegetables accessibility for
young people
The nutritional messages such as “eat 5 fruit and vegetables per day” are well
known, but despite this, the consumption of fruit and vegetables has not
increased. In France, younger generations spend four times less in buying fruit
than their grand-parents. It is important to have a better understanding of the
factors influencing the behaviour of children and teenagers, since this knowledge
would suggest new and more effective actions.
To improve the accessibility to fruit and vegetables, it is necessary to emphasize
their attractiveness, quality, and the diversity and availability of their sale-points,
as well as improving their image and innovation. It is also necessary to show the
ease and pleasure of eating fruit and vegetables and to awaken the taste-buds
of young people.
This newsletter reports scientific results on the correlation between the fruit and
vegetable consumption of children or teenagers and their environment, including
availability of the fruit and vegetable at home, distances between the home and
food-stores, and the presence of a person cooking at home.
The European Commission would like to launch a programme for distribution of
fruit at school, starting in school year 2009. France will support this “school fruit
scheme” during its Presidency of the Council of the Union, but will require high
quality fruit and a presentation that is fun and interactive for children. Indeed,
giving young people a taste and appetite for fruits is very important, but it is
also necessary to accompany them in discovering the product they have in their
hands and with consideration of their fear and rejection of the unknown.
Laure Souliac,
Head of the Office “Nutrition and Valorization of Food Quality”
Minister of Agriculture and Fisheries, France |
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Children's Health
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Once upon a time, in such an old period that I can hardly remember, children were taught
to eat a sufficient amount of good foods in order to become tall and strong. How this was
working, nobody really knew. Therefore, I was surprised when, because of my old
knowledge in nutrition, I was asked to provide some comments about worrying medical
news. I thought that this modern world was at least improving health.
Food choices have actually expanded in such huge proportion that within a country, or
even a community, including the smallest one, the family eating patterns may differ
strikingly. This widening of food choices leads to confusion between choosing for
immediate pleasure and choosing for real health benefits.
Three recent examples, around the world, remind us that modern foods may be safer but
still need to be part of a balanced diet, beginning in childhood.
In Turkey, children, and not only women or grand mothers, those eating less fruits and
vegetables (and less fibres) were more likely to suffer constipation.
In Canada, the risk of suffering from severe inflammatory bowel disease (Crohn’s disease)
is reduced by 30 % in children eating higher amounts of vegetable and by 60 % in those
eating higher amounts of fruit. The effect is proportional to the amount eaten. Dietary
fibres seem to contribute to the overall benefit in combination with vitamins. Higher
consumption of nuts and fish also prove to be beneficial. Although Crohn’s disease is rare
in children, a reason for its increased occurrence may be due to a decreased protection
against inflammation provided by a high fat, low fibre but modern diet. Unbalanced
intakes of the different fatty acids may also trigger inflammatory processes that are
exacerbated in Crohn’s disease.
In Europe, about 16 million children are now overweight or obese, an unknown situation
30 years ago. The occurrence of various cardiovascular risk factors (the so called
“metabolic syndrome”) was analysed in 5 different countries: Greece, Italy, Poland,
Hungary and France. It was found that about one out of two of these young obese already
has an enhanced cardiovascular risk, i.e. they become old before time. This suggests that
negative changes in the environment such as less fruit and vegetable in the diet, are now
overtaking health protective factors.
These three examples illustrate how several risks can be increased early in life. Does
reducing them just mean doing the opposite? Yes. How far is it achievable? As much as
we really want it…and I want it for sure for my grand children.
Yours faithfully, Granny Smith
Marie Laure Frelut,
APHP, Saint Vincent de Paul Hospital, Paris - France |
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Acid-base Balance and Alkaliniaing Foods
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The impact of diet on the body’s acid-base equilibrium has long been
ignored because of its extremely effective blood buffering systems.
However, more and more studies suggest that Western-style diets, rich in meats and processed foods, are globally acidic. This is unfavourable to the entire organism and especially in maintaining skeletal mineral balance. Among regularly consumed foods, only fruits and vegetables, despite their sometimes acidic flavour, have alkaline properties due to their organic potassium salts. Many other foods (meat, cold cuts, salted cheese) are acidifying, whereas milk or cereal products are relatively neutral in terms of acid-base balance.
These fundamental bases must no longer be ignored. Nutritional
recommendations, especially for osteoporosis, must now be based on the role of nutritional associations - milk products of course, but
associated with fruits and vegetables. In the case of copious meals
with meat and salty foods, fruits and vegetables would be the best
antidote to excess proteins and salt.
Christian Rémésy,
Research Director Inra, France |
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Fruit and Vegetables: Children's Preferences
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The first article in this edition of the newsletter explores the widely
replicated, but poorly understood finding of sex differences in
children’s consumption of fruit and vegetables (FV). Using data from
the Fruit and Vegetables Make the Marks study, Elling Bere and
colleagues identified greater preference for, and perceived
availability of FV as the principal determinants of girls’ higher
intake.
There are also age differences in children’s responses to food and
our second article describes qualitative research into the
relationship between children’s cognitive development and their
food preferences and perceptions (Zeinstra et al). The authors found
that younger children were more concerned with the texture and
appearance of food whereas older children were more influenced
by taste. They further report that children of all ages were largely
impervious to appeals to eat “healthily”.
Finally Privitera reports on research into the efficacy of ‘flavourreinforcement’
learning in increasing liking. Not only were
children’s preferences increased when foods were sweetened but
effects persisted long after sweetening ceased.
Together, the articles in the current issue highlight some factors to
consider when devising interventions – that boys are predisposed to
like FV less than girls (Bere) that influences on food likes and
dislikes differ with age (Zeinstra et al) and that an effective
practical strategy for increasing liking for FV may be to add
sweeteners (Zeinstra). Since children’s FV intake still falls well
below recommended levels in most countries, these research
findings are important and timely.
Lucy Cooke,
CR-UK Health Behaviour Unit, University College, London |
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Interventions at school to increase fruit and vegetable intake
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Low fruit and vegetable intake is known to be associated with
poor health, particularly cardiovascular disease and cancer. With
the worldwide increase in childhood obesity, and increased risk of
non-communicable diseases, there is recognition that children’s
diets need to be improved. Schools appear to be an ideal
environment to focus interventions designed to increase fruit and
vegetable intake.
The studies in this newsletter show that school fruit and
vegetable interventions are effective. This is supported by our
new literature review of school-based fruit and vegetable
interventions and programmes worldwide which includes 37
studies (http://www.lshtm.ac.uk/ecohost/projects/schoolfv.htm).
A majority of these studies (70%) produced a significant positive
effect on children’s fruit and vegetable intake in both older and
younger age groups. These studies included a range of
interventions including increasing fruit and vegetable availability
as part of snack or meal programmes, nutrition promotion or
integrating education together with increased accessibility to fruit
and vegetables. A range of approaches increase intake. The
relevant approach will depend on the local context including
differences in local education systems and cultural preferences.
As new proposals for an EU School Fruit and Vegetable Scheme
are assessed, we hope that the success shown by school schemes
are recognised as an important mechanism to improve public
health.
Joia de Sa, Research Fellow
Karen Lock, Lecturer in Public Health
London School of Hygiene and Tropical Medicine, UK |
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Editorial from the 2007 WCRF Report
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In 1997, the World Cancer Research Fund (WCRF) and the
American Institute for Cancer Research (AICR) published the
groundbreaking Expert Report, Food, Nutrition and the Prevention
of Cancer: a Global Perspective. The Report was a catalyst for
change, creating great opportunities for advancing knowledge in
the area of diet and cancer prevention, and stimulating a surge of
research in the field.
Since then, technology has revolutionised the way that
information is collected and analysed. As a result, in 2001
WCRF/AICR set out to systematically review and assess the body
of evidence on food, nutrition, physical activity, and cancer, and to
produce a second Expert Report. Food, Nutrition, Physical Activity,
and the Prevention of Cancer: a Global Perspective, published in
November 2007, is the largest project of its kind, and the
conclusions and recommendations for preventing cancer are as
definitive as the available evidence allows.
(http://www.dietandcancerreport.org)
The good news is that although cancer is one of the world’s
biggest killers, the disease isn’t simply due to fate or bad luck:
up to a third of cancers may be preventable by making lifestyle
changes. By following WCRF/AICR’s 10 recommendations and by
avoiding exposure to tobacco smoke, people can now take
action, knowing that the changes they make really can help
protect against cancer. In this issue we take a closer look at the
recommendations on plant foods and obesity, as well as the
methodology behind the Second Expert Report.
Martin Wiseman
Second Expert Report Project Director
WCRF International |
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Fruit and Vegetable Intake and Respiratory Health
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Lung diseases have increased significantly in the last 10 years and account for substantial morbidity and mortality. The influence of dietary factors has generated growing interest because of their potential impact on the genesis and evolution of lung diseases, particularly in how they may modulate the effects of environmental exposures. These factors include antioxidants, omega-3 fatty acids, and other micronutrients that might affect the immune response. Several epidemiological studies have suggested that greater intake of fresh fruits and antioxidant vitamins, particularly vitamin C, are related to lesser prevelance of cough, wheeze and asthma, and to a lower decline in lung function, and COPD symptons (Romieu, 2001,2005) but there is little information on healthy dietary patterns in relation to obstructive lung disease. Three recent studies provide additional evidence for the impact of diet on lung diseases, in particular that high consumption of fruits and vegetables, fish and whole grain products as part of a "prudent dietary pattern" is related to higher pulmonary function and less repiratory symptoms in children (Burns, 2007) and lower incidence of COPD in adults (Varraso, 2007). Similarly, children with a better adherence to the traditional Mediterranean diet, high in fruits, vegetables, fish, nuts, and whole grain products had fewer asthma and allergic rhinitis sypmtoms (Chatzi, 2007). It is time for health professionals to promote a "healthy dietary pattern" starting in childhood as part of public health messages in order to improve respiratory health.
Isabelle Romieu
Professor of Environmental Epidemiology,
Instituto Nacional de salud Public, Mexico |
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Scientific Newsletter-Neurodegenerative Diseases
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The prevalence of neurodegenerative diseases (ND) increases with
age and clearly represent a major public health problem in aging
populations. Strategies for the prevention of dementia are
therefore needed. Furthermore the onset of ND is insidious and
the neurodegenerative process may exist for many years before
dementia.
ND can be influenced by many factors; among them several
nutrients may play an important role. Higher intake of several
nutrients (vitamins C, E, B12, folates, flavonoïds, unsaturated fatty
acids) have been associated with a lower risk for Alzheimer
disease or slower cognitive decline. However results of different
available studies are contradictory and may suggest the
importance of combination of several anti-oxidants.
There is now converging evidence that composite dietary patterns
as Mediterranean Diet or consumption of fruits or vegetables are
related not only to lower risk for cardiovascular diseases but also
to slower cognitive decline or reduction in risk for Alzheimer’s
disease, and attractive hypotheses are suggested.
Converging results of future prospective studies of long duration
including patients at early stage and controlling for known
confounding factors should lead to specific recommendations in
the future.
Professor Marc BONNEFOY
CHU, Lyon - France |
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Culinary Strategy: Healthy World Produce Traditions
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In the face of mounting diet-linked chronic diseases, public health
experts are urging us to dramatically increase our consumption of
produce. As culinary educators, we approach such a challenge by first
considering strategy.
When rethinking the American diet, where produce has traditionally
played a secondary role, it is useful to look to other cultures for
inspiration, especially at a time when Americans are increasingly
demonstrating an unprecedented interest in new culinary tastes. |
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Promoting Consumption of F&V: Programs
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Working together for fruit and vegetable promotion: Each year, 2.7 million lives could potentially be saved if fruit and vegetable (F&V) consumption was sufficiently increased. WHO and FAO are working together to actively promote F&V consumption over the world. A Joint FAO/WHO Expert Consultation
recommended a minimum intake of 400g of F&V per day for the prevention of chronic diseases and for the prevention of several micronutrient deficiencies. Current data shows that for most countries, this goal is far from being met. |
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Overcoming the socioeconomic and gender gap in fruit and vegetable intake
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Why is it so difficult for most people to reach the daily
recommendation for fruit and vegetables? In Sweden, less than
20 percent of the adult population reaches the intake goal of 500
grams per day, and less than 10 percent of children reach their
goal of 400 grams. A universal pattern can be observed across
northern Europe: Intake is lower in men compared to women, in
people on low incomes and in those with lower education
compared to higher socioeconomic groups. Is it a matter of low
availability? Is the perceived high cost of fruits and vegetables
preventing desired change? Are other, |
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June Newsletter 2007
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Where does the new EU Regulation on claims leave fruit & vegetables promotion?
Given the current debate on obesity and the role that fruit and
vegetables can have in any serious solution to address this epidemic,
it seems more than reasonable that the new Regulation on Nutrition
and Health Claims should allow the fruit and vegetable sector, along
with public authorities, to continue promoting without restriction the
unique nutritional health benefits of consuming more fresh fruits and
vegetables. |
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Nutritional Life-Style and Diabetes
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Nutritional life-style and Diabetes
Diabetes mellitus (type II) has become a significant threat to public
health worldwide: it has been estimated that at least 171 million
people are affected and it is assumed that by 2030 this figure will have more than doubled to 366 million people. While the developing
countries will experience the highest burden, the impact in the
developed countries is also considerable. Reasons for the continuing
rise in the diabetes prevalence include the rising life expectancy and
aging of populations, the increasing prevalence of obesity and
associated life-style factors of low physical activity and inappropriate
diet. The latter refers to both the quantitative and qualitative aspects of eating behaviour. |
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March 2007 - Obesity, Fruit and Vegetables
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We are all involved in obesity policies
A key element in the Amsterdam Treaty was the statement that
“… high levels of human health protection shall be ensured in the
definition and implementation of all Community policies and
activities…”
All policies and activities? Yes – because it is not enough to tell school children to eat better snacks or to tell parents they should read food labels carefully. Focussing on the individual will not solve the problem. We have to ask why that individual is at risk of obesity. We have to look at causes. We have to ask: Why?
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February 2007 - Diets, Fruit and Vegetables
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The Healthiest Diet in the World
As I write this, I have on my desk the latest diet books. Each one
claims to reveal the secret to lasting weight loss and maintenance.
Most of them claim that a healthy weight can be obtained without
much effort, and some even allege that weight loss can be
achieved without dieting or exercise. If only they were right. We
are all waiting for that miracle. With obesity now a worldwide
epidemic, we need all the help we can get. In the United States,
for example, |
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January 2007 - F&V Accessibility
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Availability and accessibility of fresh fruit and vegetables (F&V) has become the most important issue in understanding why people do not eat enough F&V everyday: no F&V in vending machines, non existent new distribution systems for F&V, lack of availability at schools, lack of preparation
knowledge… |
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December 2006 - Newsletter
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Osteoporosis, a global health problem, is increasingly significant as
people live longer and the world's population grows. Prevention and treatment of osteoporosis and its complications are essential
socioeconomic priorities, calling for the development and implementation of strategies, in particular nutritional approaches and policies. |
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November 2006 – Nutrition intervention in schools:
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Schools represent a unique setting for the promotion of fruit and vegetable intake in children: they reach large captive audiences and provide many opportunities to improve nutrition, including formal learning, feeding, as well as other activities such as cooking and gardening. In addition, school-based fruit and vegetable promotion programmes can in many cases be practical and implemented at low costs but they have to compete with other priorities in increasingly crowded curricula. |
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October 2006 – Fruit and Vegetables and Cardiovascular Health.
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Recent results from the Women’s Health Initiative indicate that a diet low in fat but high in fruit, vegetables and grains does not significantly reduce the risk of cardiovascular disease in postmenopausal women... |
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September 2006 – Childhood Obesity
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If you had asked a group of medical doctors 40 years ago whether child health would steadily improve throughout the twenty-first century, the answer would most likely have been “yes”. ... |
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July/August 2006 – A European Perspective on Dietary Patterns:
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Looking at regional dietary patterns, cardiovascular health, and a study of fruit and vegetable consumption of 11-year old children in nine European countries. |
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June 2006 – From pre-natal to childhood: The importance of fruit and vegetables.
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An analysis of prenatal, postnatal, and early childhood influences on fruit and vegetable acceptance throughout childhood and into adulthood. This volume also examines the impact of exposure and consumption patterns and their link to children’s food preferences. |
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May 2006 – Nutrition: Global Dynamics, Disease Prevention and Consumption Patterns.
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Our first edition looks at the global energy imbalance and related obesity levels, gives a European outlook on the protective effective of fruit and vegetable consumption against certain cancers, and looks at social and cultural barriers to eating healthy. |
To Top
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Dec/07 Consommation de fruits & légumes et cancer - Le rapport 2007 du WCRF
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Nov/07 Consommation de fruits & légumes et voies
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Oct/07 Fruits & légumes : prévention des maladies neurodégénératives
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Sept/07 Fruits & légumes : pratiques culinaires à travers le monde
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juillet-aout/07 “Nouveaux programmes pour la promotion des fruits et légumes”
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juin/07 “Allégations nutritionnelles”
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avril/07 “Diabète de type 2”
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mars/07 “Obésité”
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fev/07 Les Stratègies D’Amaigrissement
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jan/07 Deux facteurs clés : accessibilité et disponibilité
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dec/06 Fruits et légumes et os :défis et opportunités pour l’avenir
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nov/06 Des clés pour mieux comprendre
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oct/06 Fruits et Légumes et Santé Cardiovasculaire
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sept/06 Quelles sont les causes de la montée galopante de l’obésite?
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juillet/06 Alimentation méditerranéenne, végétaux et santé
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juin/06 L’enfance: une période critique du développement des habitudes alimentaires
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Espanol - La gacetilla Científica. Nro 13 Junio 2007. Reclamos en cuanto a la salud.
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