A new study looked at whether daily cocoa flavanols or multivitamins could help protect memory and focus in older adults. More than 2,000 people took either a cocoa extract, a multivitamin, both, or a placebo for three years.
The multivitamin improved cognitive performance, while cocoa did not. Before looking to exotic plant extracts, it's worth making sure the body has the essential nutrients it needs every day.