I know of a kind, scruffy, old homeless gent in the south SF Bay Area with awful bent back and no teeth. He admitted to being hooked on heroin for most of his adult life. His mind was actually quite sharp and intact for any age but his body was a trainwreck.
Meth mouth is also a thing, but that's different. Folks who use meth look have a look like they use drugs. They look both sickly and old. I recall my mother's second cousin (similar age) who looked about twice my mom's age because she used meth.
Meth mouth is also a thing, but that's different. Folks who use meth look have a look like they use drugs. They look both sickly and old. I recall my mother's second cousin (similar age) who looked about twice my mom's age because she used meth.