That danger is methamphetaminesAKA: Meth, Speed, Chalk, Ice, and Glass.
How is it taken? Well, Meth can be snorted, injected, smoked or dissolved in fluids.
Where does it come from? Meth is imported from foreign countries or is made in illegal "superlabs" in a person's own home or apartment.
Well, if this stuff's so bad, then why do people use it?
Meth is a stimulant. It increases the release of a brain chemical known as dopamine, which is involved in motivation, pleasure, and motor functions. Using Meth can permanently alter the levels of dopamine in the brain, preventing normalization.
Effects of Meth Include: Premature aging, gum sores, and holes in the mouth or gums.