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  1. #1
    bernimx's Avatar
    bernimx is offline Associate Member
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    Sep 2007
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    Mast vs primo vs proviron

    From what i've been reading, these three compounds all act very similarly by binding strongly to the AR. Masteron seems to be usually mixed in an acetate esther, primo an enanthate , and proviron is an oral version. They all seem to work synergetically with Test, hardening you and lowering the estrogen aromatisation.

    Is this correct? If yes, which one gave you guys the best experience?

  2. #2
    Bonaparte's Avatar
    Bonaparte is offline AR-Hall of Famer
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    Primo binds weakly at the AR and is very mildly androgenic , yet decently anabolic . The other 2 are both much more androgenic (but will also cause androgenic side effects).
    Primo is amazing if you can afford to run it at a high dose, but I've never tried proviron or masteron (which, BTW, is either attached to a prop or enanthate ester).

  3. #3
    Userat204 is offline Associate Member
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    Jul 2010
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    I used a masteron propionate . It did seem to harden me up, and I felt very aggressive, but I was also using enanthate at the time. My buddy uses masteron quite a bit especially before a comp and he loves it. All I hear about is how great it is from him, but he is trying to be as hard and lean as possible during that time. I have never personally used primo.

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