Human growth hormones (hgh) are still surrounded by an arena of mystery. Some call hgh the wonder drug which causes massive strength and muscle gains in a short time. Others consider human growth hormone completely useless in improving performance and argue that hgh only promotes the growth process in kids with an early stunting of growth. Some think that growth hormones in adults cause severe bone deformities in the form of overgrowth of the lower jaw and other extremities. There is much controversy about growth hormones, so the reader must have some basic information in order to understand them. The growth hormone (HGH) is a polypeptide hormone consisting of 191 amino acids. In humans it’s produced in the hypophysis and released under the right stimuli (e.g. training, sleep, stress, low blood sugar level). It is now important to understand that the freed HGH (human growth hormone) itself has no direct effect but stimulates the liver to produce and release insulin like growth factors and somatomedins. These growth factors are then the ones that cause various postive effects on the body The problem is that the liver is only capable of producing a limited amount of these growth factors so that the effect is limited. If growth hormones are injected they only stimulate the liver to produce and release these substances and thus, as already mentioned, have no direct effect.