Mesterolone (Mesterolone (Proviron))
An oral DHT-derived androgen (Proviron) used medically for androgen deficiency and, non-medically, more as an ancillary to lower SHBG and add "hardness" than as a mass-builder. Educational reference only.
How it works
Mesterolone is a DHT derivative that is orally active without 17aa alkylation (so low liver stress). It binds SHBG strongly, freeing up other androgens, and has anti-estrogenic effects, but weak muscle-building activity on its own.
Key facts
- Molecular weight: 304.5 Da
- Half-life: ~12 hours
- Bioavailability: Oral
- Storage: Room temperature; keep dry.
Dosing overview
- Typical dose: Medical: ~25-75 mg/day
- Frequency: Daily (1-3 doses)
- Duration: Ongoing (medical) or ancillary
- Route: Oral tablet
Protocol notes
- Medically used for androgen deficiency and some fertility contexts.
- Non-medically used as an ancillary to lower SHBG and reduce estrogenic effects.
- Not a primary mass-builder.
Reported benefits
- Lowers SHBG (more free androgen)
- Anti-estrogenic effect
- Muscle hardness
- Low liver stress
- Supports libido
Possible side effects
- Androgenic hair loss
- Prostate effects
- Testosterone suppression (high doses)
- Limited anabolic effect alone
Research
- Mesterolone and SHBG (2015): Reduced SHBG and exhibited anti-estrogenic activity, supporting its ancillary use.
Community reviews of Mesterolone
- fasted_frank rated it 4/5 - Worth adding to the protocol: Mesterolone has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you want.
- bac_water_betty rated it 5/5 - Noticed clear benefits within weeks: Added Mesterolone to my protocol about 2 weeks ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- careful_claire rated it 4/5 - Solid compound with real results: Been using Mesterolone for about 3 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- reconstitute_ron rated it 4/5 - Genuinely effective after 2 weeks: Been using Mesterolone for about 2 weeks and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
Compare Mesterolone
Research and educational reference only. Not medical advice.