By Dr. Priyom Bose, Ph.D. Reviewed by Lauren Hardaker Oct 9 2025 In a groundbreaking 12-week trial, researchers discovered that a daily dose of fermented soy could sharpen memory in older adults, especially women over 70, hinting at a simple, diet-based way to support brain health with age. Study: Effects of Fermented Soy on Cognition in Older Adults: Outcomes of a Randomized, Controlled Trial. Image credit: Garna Zarina/Shutterstock.com A recent Nutrients study investigated the effects of