The book begins by pointing out that sometimes people and it seems even doctors mistake depression or other health problems which can be treated successful for Alzheimer's disease which may be untreatable.
He then offers a ten step plan for prevention of memory loss, which consists of proper diet, as well as daily physical and mental exercise. Some nutrients that have been found useful for better functioning of the brain are blueberries, spinach, and other fruits and vegetables rich in antioxidants, almonds and other nutrients rich in vitamin E, less salt in diet, as well as general nutrition that contributes to low cholesterol and normal blood pressure. High blood pressure and high cholesterol seem to be detrimental to memory. He further suggests cutting the quantity of food people consume, perhaps in half. Fasting is good. Daily physical exercise envigorates the entire body including the brain. As as the saying goes "use it or lose it", constant mental stimulation, learning new things, solving puzzles, challenging oneself intellectually in different ways through reading or even calculating totals in one's head when grocery shopping are all helpful to keep the brain active and in good shape throughout one's life.