How Melatonin Backfires When the Dose Is Too High Melatonin is a timing signal, not a sedative. When the dose is excessive or poorly timed, it can disrupt the very rhythm it is supposed to support. 😴 Next-day grogginess Large or late doses extend melatonin’s action into the morning, causing slowed alertness or a “sleep hangover.” The hormone continues signaling the brain to wind down instead of wake up. 🌙 Vivid dreams High doses can intensify REM sleep or fragment sleep cycles, making dreams m

What Are the Side Effects of Melatonin? 💤 | Dr. Jen Caudle