Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The National Center for Complementary and Alternative Medicine or NCCAM, is a United States government agency. NCCAM is dedicated to exploring complementary and alternative healing practices in the context of rigorous science, training complementary and alternative medicine (CAM) researchers, and disseminating authoritative information to the public and professionals. The NCCAM is one of the 27 institutes and centers that make up the National Institutes of Health (NIH) within the Department of Health and Human Services of the federal government of the United States. The NIH is one of eight agencies under the Public Health Service (PHS) in the Department of Health and Human Services (DHHS).