Melatonin is a naturally occurring hormone that signals the body it’s time for sleep. It is not regulated by the FDA and a wide variety of supplements are available. Before considering melatonin it’s important to consult with your physician to be sure you are a good candidate. Although it is naturally occurring, additional supplementation may be associated with some side effects. Safety in the elderly, those with heart disease, and in pregnancy / breastfeeding has not been fully established. Better safe than sorry, check with your doctor.