Steroids are produced naturally in the human body and are synthesized and administered by the body's own immune system, best dose for mk 677. The hormones, however, are injected and therefore change how the body works. What Types of Steroids Are There? Testosterone is the most common of the anabolic steroid types, and is widely used in sports by professional athletes around the world. Because it is not produced outside of the body, it can also be used by bodybuilders and bodybuilders to achieve more muscle in a single session, as these individuals are generally bigger and stronger than many competitive bodybuilding and bodybuilding competitors.They bind to your androgen receptors and produce all the desirable (anabolic) effects, best dose for mk 677.