What's in an e liquid or vape juice? The main ingredients are propylene glycol (PG) and vegetable glycerine (VG). These are solvents that are basically used to dissolve and carry the other ingredients. Vape Juice Safety: Ingredients, Health Risks, and Truth Ecigator Vape dojo Tagged "E Liquid Ingredients" Vape Dojo Going completely smoke free is difficult for many, but did you know that nicotine has been found in e cigarette liquids claiming to be 'nicotine free?' While e cigarettes don't contain tobacco, they may still