Epi's effects against gyno are completely blown out of proportion online these days...most of the people claiming it's true offer anecdotal evidence, and most of them are running other AIs simultaneously. Those who try using medical backing cite ONE study where the unmethylated parent compound (different binding affinities) was used to treat breat cancer, but they never mention that masteron (DHT) had the same effect in the same study. Androgenicity is itself anti-estrogenic in terms of gene expression. Epi isn't magical, it's just a good steroid.