In May 2018 researchers from Iran published their review of the medical scientific literature to assess the association between fruit and vegetable consumption and risk of depression. A total of 18 studies on fruit, vegetables and/or total fruit and vegetable consumption in relation to depression were included in the review. Results showed that a higher consumption of either fruit and vegetables was associated with a reduced risk of depression. In fact for each 100-g increase in intake there was an associated 3 % reduction in risk of depression.
Saghafian F et al. Fruit and vegetable consumption and risk of depression: accumulative evidence from an updated systematic review and meta-analysis of epidemiological studies. Br J Nutr. 2018 May;119(10):1087-1101