What is Proviron?

Proviron is an oral androgen — that means it's a tablet that mimics male hormones in the body. The active ingredient is mesterolone, and it's been used in medicine since the 1960s. Doctors originally prescribed it to treat low testosterone and male infertility.

Quick Facts

How Does It Work?

Proviron binds strongly to a protein in the blood called SHBG — sex hormone-binding globulin. Think of SHBG as a sponge that soaks up testosterone and stops it from doing its job. By attaching to SHBG, Proviron frees up more testosterone in your body so it can actually be used. It also doesn't convert to oestrogen — the female hormone — which helps keep side effects like water retention low.

What It's Used For

• Increasing the amount of free testosterone available in the body during a cycle.
• Reducing water retention, helping give a leaner, harder look.