Boldanexx (Boldenone Undecylenate USP 250mg/ml) is an injectable anabolic-androgenic steroid (AAS). While it is primarily manufactured and approved for veterinary use—particularly to treat horses—it is widely used illicitly in human populations for bodybuilding and athletic performance enhancement. Primary Intended Use (Veterinary Medicine) In veterinary medicine, boldenone undecylenate is used to improve the overall physical condition, coat, and nutritional state of animals (especially horses). It helps treat debilitated animals by: • Promoting weight gain and rebuilding muscle mass after illness, injury, or overwork. • Significantly stimulating appetite.