Acute cognitive performance and mood effects of coffeeberry extract: A randomized, double blind, placebo-controlled crossover study in healthy humans

Jackson PA, Kenney C, Forster J, Smith EF, Elcoate R, Spittlehouse B, Johnson J, Kennedy DO (2023) Acute cognitive performance and mood effects of coffeeberry extract: A randomized, double blind, placebo-controlled crossover study in healthy humans. Nutrients, 15(11):2418.

Mixed tree nuts, cognition, and gut microbiota: A 4-week, placebo-controlled, randomized crossover trial in healthy nonelderly adults
Chronic supplementation of a multi-ingredient herbal supplement increases speed of cognitive task performance alongside changes in the urinary metabolism of dopamine and the gut microbiome in cognitively intact older adults experiencing subjective memory decline: a randomized, placebo controlled, parallel groups investigation