Boldenone Undecylenate(13103-34-9)Strength increase API

Boldenone undecylenate is a synthetic anabolic-androgenic steroid (AAS) derived from testosterone, specifically an esterified form of boldenone with undecylenic acid (an 11-carbon fatty acid ester). It is a 1-dehydrogenated derivative of testosterone, which means it has a double bond between C1 and C2, reducing its androgenic (masculinizing) effects while retaining its anabolic (muscle-building) properties. Its mechanism of action involves binding to the androgen receptor (AR) in target tissues (skeletal muscle, bone, bone marrow, liver, skin, prostate). Upon binding, the receptor-ligand complex translocates to the nucleus, where it regulates the transcription of genes involved in protein synthesis, nitrogen retention, erythropoiesis, and lipolysis. Boldenone stimulates protein synthesis, increases muscle mass, and promotes appetite (a desirable effect in veterinary medicine). It also increases red blood cell production (erythropoiesis), improving oxygen delivery to tissues.