There’s this idea that we don’t have to worry about brain health when we’re young and that there’s no reason to work on improving it once we get older. But research shows we can change our brains no matter how old we are. Neurologist Kristen Willeumier says even in your 80s, you can still improve cognitive health and function and that if we take care of the brain, it’ll help us stay sharp. “No brain left behind,” she tells her patients. “We can make your brain better, no matter what your age is.”