Melatonin is an amine hormone produced by the pineal gland of mammals and humans,also known as pineal hormone,melatonin,or melatonin.It makes a cell that produces melanin light,hence the name melatonin.Melatonin has a certain regulatory effect on nervous system function in the body,and its main function is to induce sleep and remind people that it is time to sleep.Melatonin is secreted at night,which helps to promote the body to enter a deep sleep state,participate in the regulation of the biological clock,and play a regulating role in the circadian rhythm.