In a word, maybe. "Scientists now think a complex mix of lifestyle, genes, age, environment, and health conditions leads to the brain changes of Alzheimer's--up to 20 or 25 years before obvious symptoms." "'Alzheimer's is finally joining the list of diseases we can have an early effect on,' says Harvard neurologist Reisa A. Sperling, MD. She compares it to heart disease or diabetes, which are treated preventatively with a mix of lifestyle fixes (like diet) and targeted medica