Testosterone acetate butyrate is a type of anabolic steroid hormone commonly used in bodybuilding and athletic performance enhancement. There are several other synonyms for this substance, including testosterone butyrate acetate, TAB, and Ermalone. These different names all refer to the same chemical compound, which is typically administered via injection or as an oral tablet. Testosterone acetate butyrate is known for its powerful muscle-building effects, but it can also lead to negative side effects such as acne, hair loss, and increased aggression. Despite these risks, many athletes and bodybuilders continue to use this substance in pursuit of greater strength and physical performance.