Toxicity of humectants propylene glycol and vegetable glycerin in electronic nicotine delivery systems ScienceDirect Health Risks of E Cigarettes and Vaping American Lung Association Vaping & e Cigarettes Pediatrics in Bartram Park, St. Johns Bluff area, Behavior Health, Atlantic and Hodges, Central, Normandy Westside, Northside and Corporate Business Office, Jacksonville, Saint Johns and Fernandina Beach, FL The Danger of Chemicals Used in Vape Liquid The Science Blog E liquid The Benefits of Vegetable Glycerin and Propylene Glycol Eliquidstop Cigarettes or vapes, pick your poison Fred Hutch