"Don't listen to broscientists who say "The rats that got cancer were taking a huge amount" Because in reality rats/mice can process toxins a lot faster than a human can, so those doses were scaled to make them the equivalent of a human. If you want to risk a drug that gave 100% of rats involved in the tests cancer then more power to you. But I wouldn't risk it." From one of my earlier posts. As for the Gyno from ostarine, I'm not to sure. I know that Ostarine can suppress your natural testosterone so perhaps that cause cause a rise in estrogen but I'd say its quite a low probability. The danger with SARMs is that a lot of companies promote them as a safe alternative to steroids however Steroids have been around for close to 100 years, we know what they can do and we know what issues they can cause, with SARMs no one really knows yet other than the limited lab trials they've done on them and 95% of SARMs failed the clinical trials because of side effects deemed unacceptable i.e Cancer. Ostarine is probably the safest SARM that is publicly available.