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• Effective substance: Boldenone undecylenate
  
• Content: 250 mg/ml
• BOX: with 1x 10ml vial
  
• Administration:  intramuscular injection
• Known as: bolde, equipoise

Boldenone (INN, BAN), also known as Δ1-testosterone, 1-dehydrotestosterone, or androsta-1,4-dien-3-one-17β-ol, is a synthetic anabolic-androgenic steroid (AAS) and the 1(2)-dehydrogenated analogue of testosterone. Boldenone itself has never been marketed; as a pharmaceutical drug, it is used as boldenone undecylenate, the undecylenate ester.

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The activity of boldenone is mainly anabolic, with a low androgenic potency. Boldenone will increase nitrogen retention, protein synthesis, increases appetite and stimulates the release of erythropoietin in the kidneys. Boldenone was synthesized in an attempt to create a long-acting injectable methandrostenolone (Dianabol), for androgen deficiency disorders. Boldenone acts similar to methandrostenolone with fewer adverse androgenic effects.[medical citation needed] Although commonly compared to nandrolone, boldenone lacks progesterone receptor interaction and all the associated progestogenic side effects.