Proviroxyl from Kalpa Pharmaceuticals (Proviron) is a very effective synthetic androgen, which:

  • has a positive effect on the body;
  • increases free testosterone levels;
  • prevents the conversion of steroids to estrogens;
  • improves libido.

It has the main active substance Mesterolone – the well-known androgen, which has minimal anabolic properties. It helps suppress estrogen production and prevents the occurrence of estrogenic side effects. For this reason, many athletes and bodybuilders often use it at the end of a steroid cycle.

Proviroxyl usually provides the desired level of higher androgen and lower estrogen, which makes it preferred for many athletes in preparation for competition. This advantage is especially useful in combination with anabolics such as Primoxyl, Oxandroxyl and Stanoxyl, since it can maintain their high androgen content.

Proviroxyl has unique characteristics that make this drug an effective and useful testosterone enhancer. It also has a strong affinity for SHBG (sex hormone binding globulin), so when absorbed by the body, Mesterolone will bind to SHBG and release more testosterone. An increased amount of free testosterone will stimulate anabolic surgery, including protein synthesis, which will increase muscle mass and increase libido.

In addition, it is able to connect to the aromatase enzyme, which binds to testosterone and turns it into estrogen. It binds to the enzyme and blocks its effect on testosterone, which, in turn, reduces the amount of estrogen production. This action also reduces the retention of water in the body and gives the muscles a tighter look.


Additional information


Post Cycle Therapy


Kalpa Pharmaceuticals




30 Tabs (25 mg / tab)


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