The yk11, s23 and two compounds in the shred (s4 and mk 2866) are all sarms. As far as how I like them the strength gains are real the endurance is out of control. the only side effects has been pimples. I still have a bunch of pre-ban prohormones too (ibe, cutting edge labs, aps when they were the shit) I’ve ran Anavar, and few mild anabolics and the sarms are not to be underestimated. I’m only 39 and after each run I do a good pct clomid and a good otc test booster. I get bloodwork before and after and even at my age my test levels are in the high 700’s.