Melatonin is a hormone produced by the epiphysis found at the base of the brain. Its secretion is mainly done during the night. The production of this hormone peaks during the initial development stage of humans, slows after the age of 20 and starts reducing from the age of 45, until it is completely disappeares at old age. In the cases where there is a sleep disorder and the person is elderly, it is suggested to take food supplements laced with melatonin in order to treat insomnia, always in accordance with the instructions of a pharmacist or the physician with regard to persons suffering from a disease or receiving treatment.