Testosterone and Human growth hormone are both anabolic steroids commonly used by bodybuilders to gain muscle mass. They have legitimate medical uses, but they are more commonly known for their use as bodybuilding supplements. Although both are used for the same purpose, they are in fact very different substances.
1) Testosterone is a hormone produced naturally by both men and women. The form used by bodybuilders is synthetic and is produced in a lab. Testosterone causes the body to produce more muscle and decrease body fat, which makes it ideal for bodybuilders. It is usually used alongside other anabolic steroids by bodybuilders because they are more effective when used together.
2) HGH is also produced naturally by the human body. It is produced by the pituitary gland to control growth during childhood. Bodybuilders use a synthetic form of this hormone because it promotes lean muscle mass gain and can heal damaged tissues. HGH will cause organs and bones to grow if used in doses that are too high, which deters many people from using it.
3) Both HGH and testosterone are effective muscle builders, but testosterone is more commonly used for a number of reasons. It is generally considered much safer than human growth hormone and has fewer negative side effects. It is also significantly cheaper. Some bodybuilders will use HGH and testosterone at the same time, but that practice can be very dangerous.