Mesviron 25 is composed of mesterolone dosed at 25 mg per tablet. It is not an anabolic but a very powerful anti-estrogen.


Type: Oral
Pack: 50 tabs (25mg/tab)
Substance: mesterolone
Manufacturer: Unigen


Mesviron 25 is composed of mesterolone dosed at 25 mg per tablet.

It is not an anabolic but a very powerful anti-estrogen.

Mesviron 25 acts as an anti-aromatic: it prevents the aromatization (transformation) of anabolic steroids into estrogen. It thus avoids gynecomastia and can be combined with Novaldex to increase its effectiveness.

It should indeed be specified that Mesviron 25 (Proviron) and Novaldex are two anti-oestrogens whose mechanisms of action are different and complementary, and it is for this reason that the combination of these two products is so effective: while Mesviron 25 (Proviron) prevents aromatization of anabolics, Novaldex clogs estrogen receptor cells, preventing it from working.

It is therefore a formidable tandem.

Mesviron 25 is also not only an excellent anti-estrogen: by maintaining a low level of estrogen, Mesviron 25 also reduces water retention.
It thus gives the user the skinned look sought after by so many bodybuilders, especially when preparing for competitions.

It should be noted that Mesviron 25 tends to limit muscle gains from a steroid cycle because it attaches to androgen receptor cells instead of other steroids present in the body, which then remain blocked at the outside and therefore without effect.

This is why many bodybuilders take a minimal dose of Mesviron 25, just to avoid gynecomastia. As for mesterolone side effects, they are rare below 100mg per day.

Indeed, the tablets of Mesviron 25 are not alpha-alkylated 17 and do not present any harmfulness for the liver.

On the other hand, if we start to exceed 75 to 100 mg per day, we frequently see phenomena appear such as priapism in men or virilization in women.

We cannot emphasize enough that if the side effects depend on the product used, they depend even more on the dose used and that the bodybuilder who decides to take large doses of the products mentioned in this book does so at his own risk and peril.

Anti-estrogen stack: Mesviron 25 or Proviron + Novaldex. 1 to 2 tablets of 25 mg per day are enough to prevent gynecomastia.

Mesviron 25 is manufactured by Unigen in tablets of 25 mg, per box of 50 tablets.

Technical sheet: Mesviron 25.
Molecule: mesterolone.
Route: oral.
Category: powerful anti-estrogen.
Positive effects: prevents gynecomastia.
Negative effects: priapism, virilization.

Dose: 25 mg/day for women
50 mg/day in men.


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