Cocoa-rich products consumption can improve mood and affect in the short term.
The study carried out a systematic review and meta-analysis in line with PRISMA guidelines to ascertain the effects of cocoa-derived food on depressive and anxiety symptoms, as well as positive and negative affect. Potential sources were found on Web of Knowledge and PsycINFO until April 3, 2020. Out of 761 documents screened, nine studies were picked. Two trials were involved in examining the long-term impact (>1 week) of cocoa consumption, two reviewed the short-term effects (3 days), and five studies were conducted in acute conditions (single administration).
The results indicate that cocoa-rich products had a significant overall effect on reducing depressive and anxiety symptoms. There was also significant improvement in both positive and negative affect. The effect size in all meta-analyses was medium, while the heterogeneity was low. Despite these promising outcomes, the conclusions must be cautiously interpreted due to the short duration of the trials and the limited number of participants and studies included in the meta-analyses.
