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Produced naturally by the body, melatonin is a hormone that helps regulate the body’s sleep/wake cycle. This antioxidant is secreted by the pineal gland. Darkness promotes its secretion while light suppresses it. As people age, the body’s ability to produce melatonin naturally decreases. It is a popular supplement for travelers to ease jetlag by resetting the body’s clock. Swanson Ultra Melatonin offers both Triple Strength and Dual Release formulas while Swanson Premium comes in 1 mg melatonin and 3 mg melatonin potencies.