E cigarette flavors are toxic to white blood cells, warn scientists Worst Disposable Vapes: What to Avoid and Why Tastefog Vape Juice Brands to Avoid: Harmful Ingredients & Worst Flavours How to Know When Your Vape is Almost Empty and Done: Advie Vaping is on the rise. While e cigarettes don't contain tobacco, they may still contain many of the same toxic and cancer causing chemicals found in regular cigarettes. This includes: Acrolein (weed