Researchers at the University of California, Riverside, found that heating propylene glycol, the main ingredient in most e cigarette liquids, can produce two toxic chemicals, methylglyoxal and acetaldehyde, which damage lung cells. Using BOX AEGIS LEGEND 5 200W GEEKVAPE Health Effects of E Cigarettes Kansas Health Institute What is Propylene Glycol? What You Need to Know About PG Pod Salt UK Which e cigarette is best for me? E cigarette Comparison Switzerland Vuse Dcouvrez l'ensemble de nos box mods pour e cigarette Steam shop