Proviron
Mesterolone, 50 tablets at 25 mg. It works on testosterone already present rather than adding more.
What Proviron is
Proviron is mesterolone, and it sits apart from the rest of the oral category because it is not a growth compound. Its mechanism is to bind sex hormone binding globulin, which frees testosterone that is already present rather than contributing any of its own.
- Generic name
- Mesterolone
- Also known as
- Mesterolone
- Class
- Oral androgen, support compound
- Half-life
- Approximately 12 hours
- Aromatisation
- None
- Storage
- Cool, dry, out of light
The detail
Because it binds SHBG strongly, the effect is on free rather than total testosterone. It also competes at the aromatase enzyme, giving a mild anti-oestrogenic effect, though that is not equivalent to a dedicated aromatase inhibitor. It does not aromatise itself.
Strengths and what they cost
Both figures below are computed from the live price, the tablet count and the strength, so they are directly comparable.
| Product | Strength | Tablets | Total compound | Price | Per tablet | Per 100 mg | Stock |
|---|---|---|---|---|---|---|---|
| Quanta Pharma Proviron | 25 mg | 50 | 1250 mg | £40 | £0.80 | £3.20 | in stock |
- Quanta Pharma Provironin stock£40
Availability checked 2026-09-01. The product page carries live stock.
The other orals
Common questions
Is Proviron the same as mesterolone?
Yes. Mesterolone is the chemical name and Proviron the original brand.
What does Proviron actually do?
It binds sex hormone binding globulin, which leaves more of the testosterone already present in an unbound and active state. It is a support compound rather than one that adds hormone of its own.
Does Proviron replace an aromatase inhibitor?
No. It has a mild anti-oestrogenic effect through competition at the aromatase enzyme, but that is not the same as a dedicated aromatase inhibitor.
Does this page give dosing information for Proviron?
No. This is a reference resource covering the compound and its presentation. It does not provide dosing protocols or administration schedules.