Diet scores based on two-day food records from 2018 and 2019 stayed tied to better well-being after researchers adjusted for income, education, exercise, smoking, general health, calories and depressive symptoms.
COVID-19 offered a follow-up test: well-being fell across the group during the pandemic, but the decline was smaller among participants whose earlier diets more closely matched the Mediterranean pattern.
The observational study cannot prove cause and effect, and the sample was mostly white and relatively healthier and better off, limiting how broadly the findings can be applied.
Researchers said the results add to growing evidence that plant-rich diets with fish and olive oil may support mental health in older age, alongside known physical-health benefits.
Does this diet cause happiness, or do happier people just choose to eat healthier?
Can changing your gut bacteria with food truly act as a shield against psychological stress?
This diet acts as a stress buffer, but can the average person realistically afford it?
Mediterranean Diet Significantly Improves Mental Health in Adults 50–90: Latest Research, Biological Insights, and Policy Directions
Overview
A major new study shows that following the Mediterranean diet—rich in fruits, vegetables, olive oil, fish, and nuts—can boost mental resilience and well-being in adults aged 50 to 90. This diet not only supports brain health through nutrients like polyphenols, omega-3s, and fiber, which reduce inflammation and support a healthy gut, but also encourages social connections and enjoyable meals. These combined effects help protect against declines in mood, especially during stressful times like the COVID-19 pandemic, making the Mediterranean diet a practical and powerful way to promote both mental and physical health in older adults.