Melatonin Extra (3 mg) (60 caps). Melatonin Extra —3 mg [Glandular] is an exclusive NSP formula containing melatonin, a natural compound produced by the pineal gland (located in the center of the brain). Melatonin is vitally important to health when you consider three factors: aging, energy and sleep. As people age they produce less melatonin. Melatonin can help restore the body’s natural sleep