This Web site is operated by the American Academy of Family Physicians (AAFP), a national medical organization representing more than 110,600 family physicians, family practice residents and medical students. All of the information on this site has been written and reviewed by physicians and patient education professionals at the AAFP. Visit the AAFP Web site to learn more about the AAFP.
The National Institutes of Health (NIH), a part of the U.S. Department of Health and Human Services External Web Site Policy , is the nation’s medical research agency—making important discoveries that improve health and save lives.
The Academy of Nutrition and Dietetics is the world's largest organization of food and nutrition professionals. The Academy is committed to improving the nation's health and advancing the profession of dietetics through research, education and advocacy.
The mission of ODS is to strengthen knowledge and understanding of dietary supplements by evaluating scientific information, stimulating and supporting research, disseminating research results, and educating the public to foster an enhanced quality of life and health for the U.S. population.
The USDA Center for Nutrition Policy and Promotion (CNPP) works to improve the health and well-being of Americans by developing and promoting dietary guidance that links scientific research to the nutrition needs of consumers. CNPP and the Food and Nutrition Service (FNS) are agencies of USDA's Food, Nutrition, and Consumer Services.