A TikTok video demonstrating "pinky time" has gone viral, promising that it can prevent cognitive decline. The exercise involves participants wrapping their middle and pointer fingers together, touching their ring fingers to their thumbs and moving their pinkies up and down for several seconds. While this activity is not proven to prevent Alzheimer's on its own, experts argue that it is a broader set of behaviors that can keep the mind sharp. Dr. Kelly Gonderman, a licensed clinical psychologist, supports the idea that challenging the brain helps preserve and protect cognitive function. Other content creators argue that pinky time is also a useful tool for diagnosing Alzheimer's disease.