Propylene glycol, a component of electronic cigarette liquid, damages epithelial cells in human small airways Respiratory Research Springer Nature Link DIY PGVG base All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center VG vs PG Explained: E Liquid Ratios Guide Ecigone
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propylene glycol in vapes Propylene Glycol vs. Vegetable Glycerin: A guide for vapers and vaping