Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA)
The mission of the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University (HNRCA) is to explore the relationship between nutrition, aging and health by determining the nutrient requirements that are necessary to promote health and well-being for older adults and examining the degenerative conditions associated with aging.

National Osteoporosis Foundation (NAF)
NAF's mission is to prevent osteoporosis and related fractures, to promote lifelong bone health, to help improve the lives of those affected by osteoporosis and to find a cure through programs of awareness, advocacy, public and health professional education and research.

President's Council on Physical Fitness and Sports (PCPFS)
www.fitness.gov is the health, physical activity, fitness and sports information Web site of the President's Council on Physical Fitness and Sports. You can find out about the Council and its work, view our publications, and link to the resources of other government agencies as well as to health and fitness organizations.