Anabolic steroids are often used by athletes and body builders because they are muscle building steroids. Anabolic steroids, also called anabolic-androgenic steroids, have two different types of characteristics (anabolic and androgenic) that work together to make them muscle building steroids.

Muscle building steroids are those that have anabolic characteristics. The anabolic characteristics of muscle building steroids work in the body to increase lean body mass. Because of this characteristic, muscle building steroids are popular with athletes and bodybuilders because they like to build muscle quickly to improve their appearance and enhance their performance. This ability of muscle building steroids also makes them useful for medical treatments of ailments. Muscle building steroids can help people rebuild lost body mass due to chronic wasting.

So how do muscle building steroids work? Well, testosterone, the base hormone in muscle building steroids is the hormone responsible for instructing cells to produce protein. The testosterone in muscle building steroids fits into specific receptor sites in cells to tell them what to do. When all of the spots are filled with the testosterone in the cells, then the cells work harder than if there is only enough testosterone (either from a muscle building steroid or from natural production) to fill a portion of the receptor sites. So, up to a certain level, the more testosterone (again either from a muscle building steroid or from natural production) the harder the cells work to produce protein and, therefore, build body mass such as muscles.

Muscle building steroids are not just muscle builders, however. They also have androgenic characteristics along with their muscle building characteristics. These androgenic characteristics increase the appearance of secondary male sex hormones as well as suppression of the natural production of hormones in the body. Taking muscle building steroids at high levels can also cause serious health problems due to the side effects.