Compare · Anabolic steroid
Fluoxymesterone vs Mesterolone
Both are anabolic steroid compounds. Here's how they line up on the evidence — graded the same way.
| Fluoxymesterone | Mesterolone | |
|---|---|---|
| Evidence | Preliminary human | No credible evidence |
| Class | Anabolic steroid | Anabolic steroid |
| Summary | Fluoxymesterone is an oral 17α-alkylated anabolic-androgenic steroid (not a peptide), once FDA-approved for hypogonadism and breast-cancer palliation but now largely obsolete. Its strongest, best-documented human data concern liver injury rather than benefit, and non-medical use is illegal and banned in sport. | Mesterolone is an oral, DHT-derived anabolic-androgenic steroid once sold abroad for male hypogonadism and idiopathic infertility. Controlled human trials for its two historic uses (fertility, mood) are negative or unconvincing, and its performance 'anti-estrogen' reputation has no strong human evidence. |
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Fluoxymesterone
Fluoxymesterone, sold for decades under the brand name Halotestin, is a synthetic anabolic-androgenic steroid (AAS). It is an orally active, 17α-methylated derivative of testosterone — a steroid, not a peptide and not a SARM. It has a real but now largely historical FDA-approved medical pedigree,…
Mesterolone
Mesterolone, almost always known by the brand name Proviron, is a synthetic, orally active anabolic-androgenic steroid (AAS) derived from dihydrotestosterone (DHT). It is an androgen — not a peptide and not a SARM. Unlike most of the other agents people lump it in with, mesterolone was never…