An international team of researchers used an X-ray laser to create the first detailed maps of two melatonin receptors that tell our bodies when to go to sleep or wake up and guide other biological ...

Overview: Melatonin is used for various sleep problems. It is a hormone made by your brain that helps your body set its internal clock. Your brain makes more melatonin when it gets dark out, which ...

Add Yahoo as a preferred source to see more of our stories on Google. Often referred to as the ‘sleep’ hormone, melatonin is central to your body’s sleep-wake cycle. Levels rise gently throughout the ...

Melatonin is secreted by the pineal gland. The pineal gland was described for the first time by Herophile, in the third century. He speculated it to be the sphincter that regulated flow of thought in ...