A term used to describe a medical product or practice that is used together with (complementary) or instead of (alternative) standard medical care. Usually, less is known about most types of CAM than about standard treatments, which go through a long and careful research process to prove they are safe and effective. CAM may include dietary supplements, megadose vitamins, herbal preparations, special teas, acupuncture, massage therapy, magnet therapy, spiritual healing, and meditation. Also called complementary and alternative medicine.