We've all seen the studies that show that Clen can cause heart damage (at least in rats). We also know that Clen dramatically reduces the levels of taurine in the body. We also know that taurine is VERY important to a smooth functioning cardiovascular system. It this the reason for heart damage? Would this heart damage have occured in these studies if they were also supplementing taurine? Maybe not, we'll never know but the point is....it's possible, so take your taurine when on Clen! At least 10g/day. It will also keep those dreaded Clen muscle cramps from happening.