I would not use it, as clen is very nasty for fat loss. It was never meant for this, so it causes a lot of side effects. Besides, it will also eat up your muscles, not only fat. Finally, clen is quite tricky to use, and you can't use for more than 3-4 weeks in a row. Yohimbine is much better and effective. In fact, I have heard on another forum that yohimflame is about to be back in stock - this is a topical form of yohimbine, and it works really great.