Trenavar is a synthetic compound that is a prohormone to trenbolone, a powerful anabolic steroid. It is often marketed as a supplement for enhancing muscle growth, strength, and performance, particularly in bodybuilding and athletic circles. Trenavar is known for its potency and potential side effects, which can include hormonal imbalances and other health risks. Due to its anabolic properties, it is often banned in competitive sports and is classified as a controlled substance in many countries.