Vape Juice Ingredients: All You Need to Know 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. Does Vape Juice Expire? How to Tell, Shelf Life, & Storage What's actually inside that vape? Vaping devices don't just deliver flavor or a quick escapethey introduce a mix of chemicals, metals, and addictive substances into the body. Many believe they're just harmless MYTH : There's only THC or nicotine in the juice of my vape, no other harmful chemicals. FACT : Vapes are an aerosol. Certain chemicals have to be in any