first off........methamphetamine was made for use on humans......crystal meth is just more potent second off.....human k is weaker......and animal k was NEVER EVER meant for use on humans..... And, just because something is made with caustic chemicals DOES NOT mean it is bad for you........read up on break-downs and reactions........ from myths and rumors: Made from poison Made from several toxic chemicals; this does not mean it is itself poisonous. For example, drinkable salt water can be made from lye and muriatic acid. i am telling u i would rather be speedy than slow and stupid any day