Having trouble fitting sleep into your schedule? Reset your internal clock and re-establish healthy sleep patterns safely and naturally with Triple Strength Melatonin. A hormone secreted by the pineal gland, melatonin helps regulate the circadian rhythm, the "internal clock" that controls the body's sleep/wake cycle. It also acts as an antioxidant, combating the free-radical damage associated with aging. Our high-potency Triple Strength Melatonin capsules deliver 10 mg of pure melatonin.FAQQ: Are your melatonin supplements synthetic or natural? A: Under FDA regulations, animal-derived hormones can’t be sold without a prescription. Even though some natural melatonin may be derived from cherries, we do not carry any in Swanson products. Our melatonin products are synthesized in a laboratory.