According to Dr. Pamela Peeke, author of the NYT bestselling book The Hunger Fix, "After the age of 50, the goal is to prevent disease by maintaining an optimally healthy and active mind and body." She goes on to suggest that as we age our nutritional needs change and we should be including high fiber foods in our diets for a strong body and a sharp mind if we are over 50. As our gastrointestinal systems slow down we need to increase the fiber in our diets. Some of her suggestions for fiber-rich foods are raspberries with 8 grams per cup, whole-wheat pasta with over 6 grams per cup, lentils are high with over 15 grams per cup, green peas have almost 9 grams per cup, etc. Over all she suggests we eat 25 to 30 grams of fiber per day. Read the nutritional labels on foods you buy to check the fiber grams.