Proviron is a trademark name of the oral androgenic steroid Mesterolone.
In the late '70s and early '80s doctors treated men suffering from various forms of depression with some success.
Mesterolone is an orally active, 1-methylated form of DHT. It is like Masteron, but then in oral form. Proviron is 3-4 times as androgenic as testosterone and is structurally not able to aromatize to estrogen. One would imagine that mesterolone is the perfect tool for improving muscle strength, unfortunately the 3alfa hydroxysteroid dehydrogenase enzyme converts proviron to a mostly inactive compound known as 3-alpha (5-alpha-androstan-3alfa, 17beta-diol), which is rather a prohormone. This means that unless a user uses very high doses, most of what is administered is quite useless at the level of the androgen receptor in muscle tissue and thus mesterolone is not suitable for promoting muscle hypertrophy.
One jar of Generic Supplements Proviron contains 60 tabs and each contains 25mg Proviron.