Is it possible to prevent dementia? Or reverse it? The answer is yes. While the brain may still hold some mysteries, there is a lot we do know about getting and keeping it healthy and reversing the damage that might already be there. Your brain is the interface between your mind and spirit in this world, but it is also a physical organ that, like all organs, has nutritional needs and chemical stresses. Just like keeping a body physically fit requires exercise and nutritious food, a brain needs to be fed and exercised to stay strong or get stronger.