healthmedicinet

Harvard Medical School scientists concur that specific wavelengths of light suppress the sleep-inducing hormone melatonin in the brain. The National Sleep Foundation in Arlington, Va surveyed 1500 randomly selected adults in the U.S., Canada, Mexico, Germany, Britain, and Japan showing that at least two-thirds of those people who watched TV in the hour before bed didn’t get a good night’s sleep on work nights. The circadian clock, the body’s biological time keeper that is synchronized to the 24-hour day is thrown off by this interference with the light -dark cycle. This light exposure delays the melatonin that should surge forward.