Boldenone Undecylenate

Status

No approved human product. No FDA-approved labeling for human use exists. Boldenone undecylenate is approved only as a veterinary product. Anabolic steroids are Schedule III controlled substances. An FDA-approved animal drug exists: veterinary injection for horses (21 CFR 522.204). A veterinary approval covers that animal product only, not people.

What it is

A long-acting anabolic steroid originally developed for veterinary use.

What published research measured

An injectable anabolic steroid whose US approval is a veterinary one for horses (21 CFR 522.204). It was never developed as a human medicine, and no human clinical trial was identified. The cited studies are rat toxicology and residue analysis in cattle hair; they do not establish human effects, rates of conversion to oestrogen, or effects on red blood cells in people. Its long ester means metabolites can remain detectable for a long time. Prohibited at all times under WADA class S1.1.

Source

21 CFR 522.204 (veterinary, horses) · Behairy A et al. 2020 (rats) · Tousson E et al. 2018 (rats) · Nielen MW et al. 2006 (bovine hair residue analysis) Primary source

Sources

• 21 CFR 522.204 (veterinary, horses) · Behairy A et al. 2020 (rats) · Tousson E et al. 2018 (rats) · Nielen MW et al. 2006 (bovine hair residue analysis)
• 21 CFR 522.204 (eCFR): FDA-approved animal drug