Trenbolone, also known as "tren," is a powerful anabolic steroid that is used by bodybuilders and athletes to increase muscle building, fat loss, and strength. It is a man-made version of the hormone testosterone and is usually injected into the muscles or mixed with other anabolic steroids. Trenbolone is estimated to be three to five times more potent than testosterone at the androgen receptor. It is regarded as a high-risk, high-reward steroid, and is used by top-level bodybuilders, powerlifters, and athletes to put the finishing touches on an already impressive physique. Some of the benefits of using trenbolone as an AAS include:

• Increased muscle mass and strength faster than any other steroid
• Avoidance of many of the normal side effects associated with taking large amounts of testosterone, such as man boobs and bloating

Trenbolone acetate, a modified form of nandrolone, is the most commonly used form of trenbolone. Unlike testosterone, trenbolone acetate does not cause any fluid retention while gaining muscle mass, allowing bodybuilders to appear leaner. Trenbolone acetate also has the ability to increase red blood cell count, which enhances blood oxygenation and promotes a faster rate of recovery. However, trenbolone is a highly effective steroid that can have negative side effects, including increases in erythropoiesis, blood pressure levels, and low-density lipoprotein cholesterol, which can increase the risk of cardiovascular disease, myocardial infarction, and stroke.