What Is Melatonin? Most of us know that melatonin can be used to beat jet lag and aid in sleep — but what is it? Dr. Gerald Imber, MD, top plastic surgeon and director of the Youth Corridor Clinic, says that it is a hormone produced by the pineal gland in the brain. It's best known for functioning as a circulating hormone and influencing the circadian rhythms of the body (aka sleeping at night, being awake during the day). This is why it is often called the "sleep hormone," according to Co-Founder of Clarisonic & Skin Expert Dr. Robb Akridge.
Besides the brain, melatonin is now known to be produced elsewhere in the body, including skin, says Akridge. Imber says that melatonin has been recognized for being a powerful antioxidant and for being able to easily penetrate skin, which is where its skin care potential comes from.
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