The prevalence of mechanisms of dietary change in a community sample

Dietary patterns in middle age: effects on concurrent neurocognition and risk of age-related cognitive decline

Context

Diet plays a critical role in cognitive integrity and decline in older adults. However, little is known about the relationship between diet and cognitive integrity in middle age.

Objective

To investigate the relationship between dietary patterns in healthy middle-aged adults and neurocognition both in middle age and later in life.

Data Sources

Using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, the following electronic databases were searched: Web of Science, Scopus, PubMed, and PsychInfo.

Data Extraction

Data from eligible articles was extracted by 2 reviewers.

Data Analysis

Articles included in the systematic review were synthesized (based on the synthesis without meta-analysis reporting guidelines) and assessed for quality (using the Joanna Briggs Institute checklist for randomized controlled trials, cohort studies, and cross-sectional studies) by 2 reviewers.

Results

Of 1558 studies identified, 34 met the eligibility criteria for inclusion. These comprised 9 cross-sectional studies, 23 longitudinal or prospective cohort studies, and 2 randomized controlled trials. Findings were mixed, with some studies reporting a significant positive relationship between adherence to various “healthy” dietary patterns and neurocognition, but others reporting no such relationship.

Conclusion

This systematic review demonstrated that adherence to the Mediterranean diet and other healthy dietary patterns in middle age can protect neurocognition later in life.

Systematic Review Registration

PROSPERO registration no. CRD42020153179.

How Zoomers’ Eating Habits Should be Considered in Shaping the Food System for 2030—A Case Study on the Young Generation from Romania

Is the Food System prepared for 2030? Considering that Zoomers (Generation Z) will be the largest global cohort in the world at that time, the purpose of the study is to identify what can be learned now from their eating habits to diversify and create a more resilient Food System prepared for the future. Researchers have discovered that the Food System should encourage sustainable and healthier food production by empowering a resilient local production. These changes are aligned with Zoomer preferences for local and organic food, considering their moral, ethical, and economic implications. To gather data, a quantitative investigation was performed among university students from Romania using an online survey in which 343 responses were recorded. A direct logistic regression was performed, similar to the one presented by Wilson and Lorenz (2015), to assess the impact of factors on the changing eating habits of Zoomers. The results showed significant changes in the diet of Zoomers who are facing an increased internationalization of the food consumption; they seek convenience but are also more eager to consume healthy food. For a more resilient Food System, special importance should be given to these preferences, through local and organic production, improving delivery methods, and enhancing the food experience in a responsible and ethical manner in order to prepare it for the next majoritarian cohort. These findings can be further developed by adapting the current Food System to emerging food eating habits and also by addressing how Zoomers’ food choices can improve the environmental impact of the Food System.

Potential for, and readiness to, dietary-style changes during the retirement status passage: a systematic mixed-studies review

Context

Unfavorable diets contribute to the global burden of disease and particularly affect individuals’ health in old age. To promote healthy aging, it is vital to understand the biographical circumstances under which diets manifest and change.

Objective

This systematic mixed-studies review explored changes in dietary styles of people facing retirement.

Data Sources

Seven electronic databases were searched systematically, along with reference lists.

Data Extraction

Five qualitative and five quantitative studies were identified out of n = 974 records screened. Relevant study characteristics were extracted with a piloted form.

Data Synthesis

A qualitative convergent synthesis design was conducted.

Results

Study results were inconsistent. The majority of studies identified various dietary-style changes after retirement – some in favorable ways (eg, increased vegetable consumption [n = 4]) and some in rather unfavorable ways (eg, increased snacking [n = 2]). Influencing factors were changes in mealtime structures, available time, and financial situations accompanying retirement.

Conclusion

More high-quality, longitudinal research is needed to build a sound basis for interventions by utilizing the retirement transition as a window of opportunity for dietary changes.

Systematic Review Registration

PROSPERO registration no. CRD42018074049.

Literature review: perceptions and management of body size among normal weight and moderately overweight people

Improved understanding of how normal weight and moderately overweight people manage their body weight and shape could be used to inform initiatives to prevent and treat obesity. This literature review offers a thorough appraisal of existing research into perceptions and management of own body size among normal weight and moderately overweight people. The studies reported in the 47 publications reviewed here address various themes based on different conceptualizations. The studies point out that normal weight and moderately overweight people are much concerned about their body size, but huge discrepancies are found between their own perceptions and study categorizations. The studies also indicate that normal weight and moderately overweight people are actively engaged in managing their body size through numerous managing strategies, and dieting is widespread. Together the studies do not form a unified and coherent research field, and there is a bias towards North American study populations. Methodological problems were identified in some publications, raising questions about generalizability of the findings. Moreover, only few studies give deeper insight into the specific perceptions and actions. Repeated studies are needed in broader and more differentiated geographical, social and cultural contexts, and longitudinal studies and more in-depth explorations are especially needed.