nolvadex is also on the cancer causing list.
And proviron is not an anti estrogen, it's an anti aromatase, which means that it lessens the amount that a steroid aromitises which makes the steroid more effective
Nolvadex binds to the estrogen receptor which makes it nearly impossible for the estrogen to bind to it. This does not clear the estrogen from your body, but it makes it so the estrogen cannot cause unwanted side affects
arimidex completely whipes out the estrogen leaving very little chances of estrogen induced bloating or gyno, arimidex is by far the best at reducing bloat and gyno.