This is probably why long-term cannabis use can cause gum disease, which has been noted in multiple studies including one from Columbia University
She was beautiful, and hip, and smoked, at least when she partied
Does Smoking Increase Testosterone Levels
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Because it can irritate the eyes, nose and throat at even low levels, formaldehyde exposure often causes headaches, runny nose, nausea, wheezing, shortness of breath and other respiratory symptoms
241 Eugene Umberger, "In Praise of Lady Nicotine: A Bygone Era of Prose, Poetry