This page discusses the pineal gland's role in producing melatonin, a hormone essential for regulating sleep-wake cycles influenced by light and darkness. It notes that blind individuals may face disr...This page discusses the pineal gland's role in producing melatonin, a hormone essential for regulating sleep-wake cycles influenced by light and darkness. It notes that blind individuals may face disruptions in these cycles. Melatonin supplements can enhance sleep quality and help with jet lag, generally without severe side effects.