Hello, First off big fan of your YouTube channel. Love the honesty and info you provide. My cousin is an endurance athletes. He is using cardarine gw 501516, sr 9009 and just started mk 677. I have done some research on cardarine and some of the studies have shown that it causes cancer. Now this was in rats and the dosage was higher than normal. I don’t want my cousin taking something that will hurts him in the long run and if he is competing how long will this stuff stay in his system if he is ever drug tested? Your advice/opinion are very much appreciated. Thank you for your time