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 Preliminary Study Confirms Antibacterial Properties of E Liquid E Cigarette Reviews and Rankings The combination of propylene glycol and vegetable glycerin e cigarette aerosols induces airway inflammation and mucus hyperconcentration Scientific Reports Propylene Glycol In Vapes Food Grade Propylene Glycol The Effects and Safety of Propylene Glycol & Vegetable Glycerine Pod Salt UK Clark Chronicle Safer is not equal to safe.