the part of the brain that regulates the production of the hormone melatonin is called
Melatonin Melatonin, also known as N-acetyl-5-methoxy tryptamine,[1] is a hormone that is produced by the pineal gland in animals and regulates sleep and wakefulness.[2] Melatonin is also produced in plants where it functions as a first line of defense against oxidative stress.[3]