Melatonin is a powerful hormone and antioxidant with numerous effects on the metabolism and the health of humans. Available as a dietary supplement in the United States since 1993, it is one of the most popular over-the-counter alternative remedies available. Comprising contributions from researchers who have studied the role of melatonin in various disease and physiological states, Melatonin in the Promotion of Health, Second Edition provides a wide variety of expert reviews on the biology of melatonin relevant to health.