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Proviron 25

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12 hours
Anabolic steroid
Men 25-100 mg/day
Active Substance
50 tabs x 25 mg/tab



  • Chemical name: 1α-Methyl-17β-hydroxy-[5α]-androstan-3-one
  • Formula: C20H3O2
  • Anabolic activity index: 150%
  • Androgenic activity index: 40%





50 tabs x 25 mg/tab


Proviron 25 is often overlooked but holds a unique position in a bodybuilder's toolkit. Unlike traditional anti-estrogens, Mesterolone is an anabolic steroid derived from dihydrotestosterone. In terms of structure, it closely resembles Methenolone, with differences akin to those between men and women.

Primarily considered an aromatase inhibitor, Mesterolone does possess some estrogen receptor-blocking properties, albeit not dominant. This dual nature defines Mesterolone's character. Its exceptional qualities don't end there; it offers a range of valuable benefits:


Benefits of Mesterolone (Proviron 25):

  • Enhanced Free Testosterone: Mesterolone attaches to sex hormone-binding globulin, increasing free testosterone levels in the blood. Elevated free testosterone is highly advantageous for athletes.
  • Preventive Aromatization: Many athletes incorporate Mesterolone for 5-7 days mid-cycle to counteract aromatization effects during anabolic steroid use.
  • Muscle Definition: Ideal for pre-competition preparation, it enhances muscle hardness and definition. Popular among actors and models seeking a muscular appearance for photoshoots.
  • Libido Boost: Mesterolone significantly increases libido in men, often leading to spontaneous erections. This effect makes it invaluable when paired with libido-lowering compounds like Trenbolone, Nandrolone, Norethandrolone, or Ethylestrenol.
  • Post-Cycle Recovery: For post-cycle recovery, Mesterolone can be combined with Tamoxifen (Nolvadex) or Clomiphene (Clomid) for optimal results.


Possible Side Effects of Proviron 25:

  • Androgenic Effects: Mesterolone is an androgenic compound, which means it may cause side effects typical of androgens, such as acne, oily skin, and increased facial or body hair growth (hirsutism).
  • Mood Changes: Some users have reported mood swings, irritability, or aggression while taking Mesterolone.
  • Hair Loss: For individuals predisposed to male pattern baldness, Mesterolone can accelerate hair loss.
  • Prostate Enlargement: In some cases, Mesterolone can lead to an enlargement of the prostate gland, which may result in urinary symptoms.
  • Suppression of Natural Testosterone: Although Mesterolone can increase free testosterone, it may also suppress the body's natural testosterone production when used for extended periods. This can lead to potential hormonal imbalances.
  • Liver Stress: While Mesterolone is generally considered mild on the liver, it can still pose some strain on the organ when used in high doses or for prolonged periods.


Recommended Daily Dosage for Proviron 25:

Daily dosages typically range from 25 to 100 mg, which translates to 1-4 tablets.

Customer Reviews

Verified Purchase
Feel good meds, I went to buy more and itโ€™s out of stock. Will keep libido high and maybe itโ€™s all in my head but I just feel good on 50mgs a day.
Juice head
Verified Purchase
My go to for pro v. Clean products.

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