The cleanest way to do amphetamines: Adderall
Adderall is a mixture of amphetamine & dextroamphetamine salts, typically prescribed to those with ADD, or narcoleptics. Best of all, its made in a regulated factory, unlike the methamphetamine made by your local speed cook.
Real meth would eat up your teeth & nostrils (if you snort) with the quickness in addition to your fat loss. Most 'crank' isnt fit to put in the human body. If it doesnt look like glass or ice, its probably your run-of-the-mill speed with a purity of 10-50%. If it does look like glass or ice shavings, then it is crystal meth, and unless its been cut, it is probably 70-99% pure.