A new study led by researchers at Swansea University suggests the way teenagers eat can influence their mental health. The research team also has detailed plans for future studies to better understand how diet and mental health are related.
Published in a magazine nutrientsthis review considered results from 19 studies that investigated the association between diet and mental health in adolescents. Overall, healthier dietary patterns were generally associated with fewer symptoms of depression. In contrast, poor-quality diets were more often associated with higher levels of psychological distress.
whole meals and supplements
Researchers looked at six randomized controlled trials and 13 prospective cohort studies. Their analysis found mixed evidence when it comes to individual dietary supplements. For example, some results suggested that vitamin D may help reduce symptoms of depression in teens, but the results were inconsistent.
However, broader dietary patterns showed clearer trends. Diets that focused on overall quality and balance were more consistently associated with improved mental health than those that focused on single nutrients alone.
Why is adolescence important?
The authors emphasize that adolescence is a critical stage for brain development and mental health. This period provides an important opportunity for prevention and early support. Because diet is part of daily life, it stands out as an element that can be modified and expanded across the population.
At the same time, researchers note that current evidence is not entirely consistent. Factors such as socio-economic status and gender can influence the relationship between diet and mental health, making the relationship more complex.
evidence gap
This review also aimed to further relate the findings to real-world situations beyond strictly clinical populations. The goal is to better inform both medical practice and public health strategies.
However, the researchers highlight significant gaps in the existing literature. While much of the current research focuses on depression, other important outcomes such as anxiety, stress, externalizing behaviors, self-esteem, and aggression have received less attention.
Roadmap for future research
To move the field forward, the authors propose a detailed roadmap for future research. They recommend more exposure-based study designs, inclusion of biological markers, and better standardization across studies. It also calls for open science practices and investigating broader mental health outcomes.
This research was supported by the Cognitive Health Committee of the Institute for the Advancement of Food and Nutrition Sciences (IAFNS).
Corresponding author Professor Hayley Young, from Swansea University’s School of Psychology, said: “Overall, our findings suggest that public health and clinical strategies should prioritize whole-food approaches over single supplements when considering adolescent mental health. However, further high-quality research is needed to determine which dietary patterns are most effective for whom.”
