Melaton-5™ Details – Thorne offers melatonin in both 3 mg (Melatonin-3) and 5 mg (Melatonin-5) capsules. Melatonin, the primary hormone of the pineal gland, is a powerful “chronobiotic” that helps maintain the body’s normal circadian rhythms.* In individuals who have difficulty sleeping or who have altered circadian rhythms because of jet lag or night shift work, melatonin supplementation promotes the resynchronization of this cycle.* Supplementation can also benefit those whose difficulty sleeping is caused by the aging-related decrease in the body’s ability to synthesize melatonin from the amino acid tryptophan.* Research indicates melatonin exerts its sleep-promoting efficacy by decreasing the amount of time needed to fall asleep, by promoting the ability to stay asleep, and by enhancing the depth of sleep.*