For Occasional Sleeplessness. Melatonin is a neurohormone produced in humans by the pineal gland. A favorite of travelers it governs the body's circadian rhythms helping the body ease into restful sleep. Melatonin is also a potent antioxidant. . Suitable for vegetarians. Contains no yeast dairy egg gluten soy or wheat. Contains no sugar starch salt preservatives or artificial color flavor or fragrance.