As we all know, some estrogen is needed for libido purposes. So in that case, taking 50mgs of Proviron with only 250mgs of Test Cyp and 400mgs of EQ per week kill sex drive? This is in regards to the proviron as it does act as an anti estrogen. I'm afraid that maybe the proviron will lower too much estrogen with such little Test Cyp. And it might cause libido problems.