Natrol is an American health supplement brand founded in 1980, specializing in vitamins, sleep aids, and mood support supplements. Best known for their melatonin products — among the best-selling in the USA — Natrol also offers a wide range of biotin, 5-HTP, and other wellness supplements designed to support sleep, stress, energy, and overall health. With over 40 years of experience, Natrol is a trusted name in natural health and everyday well-being.