Alternative medicine may include a variety of non-traditional health care and treatment, including acupuncture, applied kinesiology, aromatherapy, ayurvedic medicine, bioharmonics, chelation therapy, chiropractic, complementary medicine, holistic medicine, homeopathy, hypnosis, iridology, kirlian photography, macrobiotics, massage therapy, naturopathy, reflexology, reiki, rolfing, acupuncture, herbal medicine, homeopathy, naturopathy, nutrition, tibetan medicine, and traditional chinese medicine. Alternative medicine includes practices that incorporate spiritual, metaphysical, or religious underpinnings; non-European medical traditions, or newly developed approaches to healing. There are almost 500 such systems.