Effects of anthocyanin-rich supplementation on cognition of the cognitively healthy middle-aged and older adults: a systematic review and meta-analysis of randomized controlled trials – PubMed Feng RC, Dong YH, Hong XL, Su Y, Wu XV. Effects of anthocyanin-rich supplementation on cognition of the cognitively healthy middle-aged and older adults: a systematic review and meta-analysis of randomized controlled trials. Nutr Rev. 2023 Feb 10;81(3):287-303. doi: 10.1093/nutrit/nuac055. PMID: 35960187.