Boldenone is primarily used in veterinary medicine to promote muscle growth and improve appetite in animals, particularly in horses. It is often administered to enhance physical performance and recovery in racehorses or other working animals. In some cases, it is also used to treat muscle-wasting conditions or to support recovery after illness or injury in livestock. Outside of veterinary use, it has been misused in human sports as a performance-enhancing anabolic steroid, though it is not approved for human medical use. Its anabolic properties help increase protein synthesis and nitrogen retention, contributing to muscle development and strength.