Main Ingredients In Vapes What Chemicals Are In Vapes? A Detailed Examination Of E Cigarette Ingredients Vaping Liquid E Liquid Ingredients: What Goes Into Your E liquid? Joe's Juice Myth! ~ Have you heard that e liquid is full of harmful chemicals? It's not true it's only got 4 ingredients. #vaping #vape #vapeuk #ecig #vapour DIY Vape Juice: How to Make Your Own E Liquid? Container News Do you know what you're vaping? Propylene glycol (PG) and vegetable glycerin (VG) are the main liquids in vapes. When heated, these chemicals turn toxic and aren't safe to breathe.