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Melatonin is a hormone synthesized from the amino acid tryptophan and secreted by the pineal gland in the brain. Melatonin is secreted in a circadian rhythm and helps to regulate the body’s sleep/wake cycle. In addition to promoting restful sleep, melatonin also functions as an antioxidant and plays a key role in maintaining healthy immune function. An effective dose of melatonin varies depending on the individual and the intended use; best practice is to start with a low dose and gradually increase until desired effect is achieved. *