But scientists are now looking at new ways to help the brain heal after a stroke. This led the team to wonder: could these traveling mitochondria be used to help stroke patients? The mice that exercised had less damage to the brain’s white matter—the parts of the brain that help send messages between brain cells. Once in the brain, the mitochondria reached different types of brain cells—including neurons and support cells that protect and nourish the brain. If you care about stroke, please read studies that diets high in flavonoids could help reduce stroke risk, and MIND diet could slow down cognitive decline after stroke.