Hormonal changes associated with aging result in slower metabolism, loss of muscle mass, a propensity for weight gain, cognitive decline, and increased risk of diabetes, heart disease, and osteoporosis. Age-related changes in physiology and metabolism also increase the risk of deficiencies for specific nutrients, including protein, calcium, potassium, and vitamins D and B12. Consuming three servings of dairy foods a day provides a natural, tasty, and highly bioavailable source of many nutrients often lacking in senior nutrition.