Sniffing out Alzheimer's: simple smell test could spot early brain changes

This study explores whether a simple, at-home smell test can help detect early signs of Alzheimer's and other memory disorders. Researchers will ask 250 adults with mild memory or behavior concerns, as well as healthy older adults, to take a 45-minute scratch-and-sniff test using a smartphone app. The goal is to develop a low-cost, noninvasive tool that could one day help doctors identify brain diseases earlier.