human growth hormone are also known as somatotropin is basically a peptide hormone, which is responsible for cell regeneration, cell reproduction and stimulating growth. Hence it is the very important element for the human body. It has been studied for more than 100 years. It was first identified for its dramatic effect on longitudinal growth. Presently it is known to have a generalized effect on protein, lipid and carbohydrate metabolism. Research is conducted to know its effect on areas of sleep.