Ergothioneine is a diet-derived antioxidant with emerging evidence of neuroprotective benefits, but no dose-ranging study has evaluated its effects in healthy older adults. In this 16-week randomized, double-blind, placebo-controlled trial, 147 adults aged 55–79 with subjective memory complaints received ergothioneine (10 mg or 25 mg/day ErgoActive®) or placebo. The primary outcome was the change in composite memory (CNS Vital Signs). Secondary outcomes included other cognitive domains, su...
