'Fat strippers' only really work by lower appetite. The increase in metabolism is only about 2-3% (with ephedrine it is).
Clenbutenol is what body builders use and THAT is nasty nasty stuff. Ephedrine is 2-3% as mentioned, clen is 45-50% and you can only take it for a few days on the trot.
Even fast walking does you in on that (HR through the roof).