Drug users use a lot of drugs
"The most important reason meth makes your teeth fall out and ruins your life but Adderall just makes you study a little harder is that the meth users are taking 50x higher doses"The reason meth addicts have bad teeth isn't because of the dosage of the drug. It's because stimulants make you want to eat candy and drink sugar water, because meth addicts lose track of oral hygiene in favor of doing meth or something else more interesting, and because they're smoking it (along with other drugs).