Doctors who specialize in the aging process say that dementia is not inevitable . Early onset Alzheimer 's disease , which often has a strong genetic component , may not be delayed with any lifestyle changes . Making positive lifestyle changes earlier in life can lessen your chances , they say . Alzheimer 's is perhaps the best known and most feared form of cancer . Even moderate exercise can actually increase the size of the brain 's size .
Doctors who specialize in the aging process say that dementia is not inevitable . Making positive lifestyle changes earlier in life can lessen your chances , they say . Alzheimer 's is perhaps the best known and most feared form of cancer . Even moderate exercise can actually increase the size of the brain 's size .