Is melatonin making you murky in the morning? Our bodies naturally produce the hormone melatonin to help regulate our sleep-wake cycle. Melatonin is also a popular supplement meant to address sleep woes like insomnia and jet lag. Dr. Andrea Matsumura, aka Sleep Goddess MD , a board-certified sleep medicine physician and menopause expert, said timing, proper dosing and key pairings are crucial to getting the most from melatonin supplements without negative effects like grogginess. “Melatonin is