Official Dietary Guidelines Research Articles

Being a ‘good mother’: Dietary governmentality in the family food practices of three ethnocultural groups in Canada

In this qualitative study with three ethnocultural groups in two regions of Canada, we explore how official dietary guidelines provide particular standards concerning 'healthy eating' that marginalize other understandings of the relationship between food and health. In families where parents and youth held shared ways of understanding healthy eating, the role of 'good mother' was constructed so as to include healthy eating expertise. Mothers expressed a perceived need to be personally responsible for providing skills and knowledge about healthy eating as well as guarding children against negative nutritional influences. Governing of family eating practices to conform to official nutritional advice occurred through information provision, monitoring in shopping and meal preparation, restricting and guiding food purchases, and directly translating expert knowledges into family food practices. In families where parents and youth held differing understandings of healthy eating, primarily families from ethnocultural minority groups, mothers often did not employ the particular western-originating strategies of conveying healthy eating information, or mentoring healthy meal preparation, nor did they regulate or restrict children's food consumption. Western dietary guidelines entered into the family primarily through the youth, emphasizing the nutritional properties of food, often devaluing 'traditional' knowledge about healthy eating. These processes exemplify techniques of governmentality which simultaneously exercise control over people's behaviour through normalizing some family food practices and marginalizing others.

Dietary management of women with polycystic ovary syndrome in the United Kingdom: the role of dietitians

Polycystic ovary syndrome (PCOS) is a common endocrine condition associated with hyperandrogenism, infertility and metabolic dysfunction. Weight management through diet and lifestyle modifications are fundamental to its management; however, presently, there are no official dietary guidelines. The present study aimed to explore the dietary and lifestyle strategies followed by women with PCOS and the contribution of dietitians to its management. A questionnaire was completed by 105 UK dietitians focused on the service provided and a patient questionnaire and 7-day food diary were completed by women with PCOS (n = 206 and n = 196, respectively). Food diaries were analysed for energy and macronutrient intake and the questionnaire focused on the dietary advice received. Advice provided by dietitians focused on a reduction in energy intake (78%) and dietary glycaemic index (77%), often in combination. Of the women with PCOS who were following a diet specifically for their PCOS (57%), regimes included a low glycaemic index (34%), weight loss diets (16%) or a combination (26%). Of interest, 73% of overweight women were not following a diet to promote weight loss. Nutritional information predominately came from books, with only 15% of women having seen a dietitian. Eighty-four percent of women with PCOS who had increased physical activity (48%) self-reported an improvement in their symptoms. Women with PCOS recognise the importance of diet, but few received dietary advice from a registered dietitian. The dietary information women with PCOS received was often from an unregulated source. A consensus statement of evidence-based dietary advice for women with PCOS is needed and would be a useful resource for dietitians.

International recommendations for consumption of long-chain omega-3 fatty acids

As an appreciation of the cardioprotective properties of the long-chain, fish-oil-derived omega-3 fatty acids (eicosapentaenoic and docosahexaenoic acids) has grown, so too have official dietary guidelines. Health organizations and government agencies are typically recommending intakes that either maintain the status quo (about 100-200 mg/day in most western countries) or are intended to actively reduce risk for cardiovascular disease. The latter are around usually 400-600 mg/day, an amount likely to stimulate commercial interests to fortify foods with omega-3 fatty acids. Fortification is perhaps the best long-term solution to the chronically-low intake of omega-3 fatty acids that plagues western cultures.

Guidelines for daily carbohydrate intake: do athletes achieve them?

Official dietary guidelines for athletes are unanimous in their recommendation of high carbohydrate (CHO) intakes in routine or training diets. These guidelines have been criticised on the basis of a lack of scientific support for superior training adaptations and performance, and the apparent failure of successful athletes to achieve such dietary practices. Part of the problem rests with the expression of CHO intake guidelines in terms of percentage of dietary energy. It is preferable to provide recommendations for routine CHO intake in grams (relative to the body mass of the athlete) and allow flexibility for the athlete to meet these targets within the context of their energy needs and other dietary goals. CHO intake ranges of 5 to 7 g/kg/day for general training needs and 7 to 10 g/kg/day for the increased needs of endurance athletes are suggested. The limitations of dietary survey techniques should be recognised when assessing the adequacy of the dietary practices of athletes. In particular, the errors caused by under-reporting or undereating during the period of the dietary survey must be taken into account. A review of the current dietary survey literature of athletes shows that a typical male athlete achieves CHO intake within the recommended range (on a g/kg basis). Individual athletes may need nutritional education or dietary counselling to fine-tune their eating habits to meet specific CHO intake targets. Female athletes, particularly endurance athletes, are less likely to achieve these CHO intake guidelines. This is due to chronic or periodic restriction of total energy intake in order to achieve or maintain low levels of body fat. With professional counselling, female athletes may be helped to find a balance between bodyweight control issues and fuel intake goals. Although we look to the top athletes as role models, it is understandable that many do not achieve optimal nutrition practices. The real or apparent failure of these athletes to achieve the daily CHO intakes recommended by sports nutritionists does not necessarily invalidate the benefits of meeting such guidelines. Further longitudinal studies of training adaptation and performance are needed to determine differences in the outcomes of high versus moderate CHO intakes. In the meantime, the recommendations of sports nutritionists are based on plentiful evidence that increased CHO availability enhances endurance and performance during single exercise sessions.

Nutrient and food intakes in selected subgroups of Belgian adults.

In March 1997, official dietary guidelines were for the first time published in Belgium by the National Council on Nutrition. These guidelines are entirely focussed on nutrient intake and do not translate this information into specific 'food-based' recommendations. In this paper, actual intake data for the adult Belgian population are compared to these guidelines. It is concluded that the overall macronutrient intake pattern in Belgium corresponds to the typical Western so-called affluent diet. As a next step, an attempt is made to outline a conceptual framework for developing food-based dietary guidelines on the basis of existing food consumption databases. For that purpose, nutrient and food intake profiles--percentage of consumers and mean intakes for the total population and for consumers only--are studied for subgroups of the population that do or do not comply to predefined dietary goals for total fat intake, fibre intake, and fruit and vegetable intake. Finally, it is shown with an example that these data can be used as a basis for formulating healthy food recommendations towards the general population in terms of specific foods or food groups to be avoided or to be chosen preferably. The food and nutrient intake data used in this paper are from the BIRNH study (Belgian Interuniversity Research on Nutrition and Health, 1980-1984), the only nationwide food consumption survey on an individual level ever carried out in Belgium.

Dietary guidelines and food recommendations in Denmark. Nordic Committee of Foods, Nordic Council of Ministers, National Research Council, Denmark.

In Denmark the official dietary guidelines and food recommendations are expressed in the Five Dietary advices and the Danish food circle. Such guidelines are entirely different from recommendations on nutrient intakes, which are expressed in terms of exact values and established through a more formal procedure. Some of the most fundamental principles for food recommendations given to the public are that they are perceived as consistent and based on a firm consensus, and that their relevance and translation into practical action is obvious to the public. When the situation in Denmark is compared to these principles the main issue turns out to be neither lack of consistency in recommendations issued by government agencies and voluntary health organisations, nor is it lack of consensus among the experts about the fundamental messages of the guidelines. A more important problem is that the public does not distinguish between formal recommendations from authorized sources, and a variety of advices from other sources as well as non-formal comments from individual scientists. A cause of serious concern is the fact that the Danish public seems to lack a realistic picture of what the dietary guidelines imply in terms of foods. A number of contradictions is built into the process of communicating dietary recommendations effectively to the public. These can only be solved if the process is planned on a long-term basis.