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 Vaping can silently destroy your body, damaging multiple organs without you realizing it. Each puff delivers a mix of nicotine, propylene glycol, glycerin, heavy metals, and flavoring chemicals that slowly corrode your It's NOT just water vapor. Vaping exposes your lungs to harmful chemicals and can affect your overall health. This Vaping Awareness Month, get the facts and free support to quit. Text READY Liquid E Cigarettes Liquid nicotine used in e cigarettes still a danger to children despite recent decline in exposures