Spectrum Pharma | Proviron
Proviron is a synthetic, orally effective androgen which does not have any anabolic characteristics.
Proviron is used in school medicine to case or cure disturbances caused by a deficiency of male sex hormones.
Many athletes, for this reason, often use Proviron at the end of a steroid treatment in order to increase the reduced test. production.
Potency25 mg / tablet
AppearanceWhite tablet
Packing10 tablets*
Dosage50-100 mg / day**
Performance chart
Muscle Gain
Fat/Water Loss
Side Effects
Keep Gains

* Packed and sealed in white HDPE plastic bottle

** 50-100 mg / day using a pyramid approach. Up to 72 mg / day is recommended to professional strength athlete.


Proviron or Mesterolone is an oral androgen which is not capable of aromatising. More commonly refereed to as proviron, the brand name given to the drug by Spectrum Pharma, it is used in the medical world to treat different forms of sexual dysfunction. Sexual disinterest, impotency and low sperm count can be successfully reversed with the treatment of this drug, which acts as a substitute for the natural male androgen.

Although this steroid has little benefit for its anabolic properties, it does hold some very useful characteristics which can aid a bodybuilder. Due to the compounds high affinity for plasma binding proteins such as SHBG, it is believed the drug can aid the effects of other steroids by increasing the percentage of unbound free concentrations.

Also of a great benefit of mesterolone is its action as an anti-aromatase within the body. This works by slowing or stopping the aromatisation of steroids into oestrogen. This is not to be confused with the action of the likes of nolvadex which work by blocking the oestrogen binding and activating the tissue. The anti-aromatase is thought to work by the ability of the drug to compete for binding to the aromatase enzyme, thus temporarily blocking the enzyme to interact with other hormones. This effect is obviously much more profound than the actions of nolvadex and other anti-oestrogens, which do nothing to actually reduce the level of oestrogen being produced, rather just block its ability to activate tissues. Many may choose to use both an anti-oestrogen and an anti-aromatase so to inhabit oestrogenic side effects via both methods. Dosage of 50mg each day of proviron will likely hold off side effects such as gynecomastia when using aromatising steroids.

Dosage of 50mg each day of proviron will likely hold off side effects such as gynecomastia when using aromatising steroids.

Proviron is a drug which is likely familiar to the competitive bodybuilder. The drugs abilities to both increase androgen and reduce oestrogen levels is highly sought after by a bodybuilder close to contest. Proviron is often used in higher doses in this phaase, and can bump up the levels of androgens, especially useful if the likes of Winstrol and Anavar are being used which have a low androgenic nature. The increase androgen levels will bring about a dense solid look to the users physique.