The combination of propylene glycol and vegetable glycerin e cigarette aerosols induces airway inflammation and mucus hyperconcentration Scientific Reports E liquide tabac menthe 6mg Cdiscount Propylene glycol may be safe to eat, but its toxic to inhale. Inhaling this toxic e cigarette liquid ingredient can lead to lung inflammation and higher risk of respiratory disease. Top ventes : ECG, l'e liquide incontournable des bureaux de tabac franais SmokingBox Some e cigarette ingredients are surprisingly more toxic than others