Anabolic Androgen · AlphaStack™ Compound Database

Boldenone Undecylenate

Also known as: Equipoise · EQ · Bold · Boldabol
WADA BannedNADA BannedAnabolic Androgen

A structurally modified testosterone with a double bond added at the 1-2 position. Originally developed as a long-acting injectable version of methandrostenolone. Never reached human pharmaceutical market. Long detection window is a significant risk factor.

Side Effects & Risks

Performance Use

Boldenone is a long-cycle compound. Its very long half-life means it takes several weeks to reach stable blood levels and several months to clear, which makes it unsuitable for short cycles and well-suited for extended bulking or recomposition phases of sixteen weeks or more. It is valued for the steady quality muscle accumulation it produces and p...

Stacking & Combinations

Boldenone is always run with a testosterone base, with Testosterone Enanthate or Cypionate being the natural pairing given their compatible half-lives. In longer bulking protocols it is sometimes combined with Nandrolone Decanoate, though the combined suppressive load is significant and recovery planning needs to account for it. In recomposition pr...

Real-World Risk

The detection window of four to five months is the risk that ends competitive careers. Athletes have tested positive for Boldenone after claiming they stopped use well before the competition window, and in some cases the positive tests have been credible, illustrating how unpredictably long the meta...

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