Melatonin is a biological hormone secreted by the human pineal gland, is an indispensable natural sex hormone in the human body, melatonin benefits are as follows: First, anti-aging effects, while free radicals can be scavenged, slowing down the aging of the human body, to maintain a person’s energy and youthful state, the elderly often appear melatonin secretion reduced; Second, melatonin can mediate human sleep, the elderly appear to sleep less, mainly due to the body melatonin Melatonin has a certain anti-tumor effect, melatonin can promote the growth of white blood cells, improve the body’s resistance, and play an anti-tumor role. Melatonin has many benefits, if the elderly have reduced melatonin secretion, can be under the guidance of a physician appropriate supplement melatonin.