Healthful diets reduce depressive symptoms, according to a meta-analysis published in Psychosomatic Medicine. Researchers reviewed 16 studies that reported effects of healthful dietary interventions on depression and anxiety. Diets that reduced the intake of fatty foods, such as processed meats, and increased fruit and vegetable consumption led to significantly decreased symptoms of depression, compared with control diets. Increased intake of fiber, minerals, and vitamins from plant-based foods may improve pathways related to depression, including inflammation and oxidative stress.
Firth J, Marx W, Dash S, et al. The effects of dietary improvement on symptoms of depression and anxiety: a meta-analysis of randomized controlled trials. Psychosom Med. Published online February 5, 2019.