Meth addicts hold the coveted title of least-attractive illegal drug abusers. Methamphetamine is a highly addictive substance, and its abuse can lead to numerous undesirable side effects such as anxiety, insomnia, paranoia, hallucinations, tooth decay and permanent brain damage. Long-term meth abusers can look years, if not decades older in appearance as their skin loses elasticity and blood vessels constrict and experience necrosis. At corrections facilities and rehab centers from Irvine, Calif. to the East Coast meth addiction is the face of nightmares and horror stories, akin to the casting call for Michael Jackson’s “Thriller.” The following are just some examples of the physically deteriorating effects of methamphetamine abuse.