NOW - Melatonin Chewable - 180 Lozenge(s) - NPN: 80008908 -- Melatonin is a neuro-hormone (amino acid) naturally produced in the pineal gland in the brain and present in high amounts in the gastrointestinal tract. It is involved in many of the body, brain and glandular biological functions including regulation of normal sleep/wake cycles. This chewable format is ideal for those who cannot swallow pills, or prefer faster absorption.