What Is in Vape Juice? Vape Juice Ingredients Explained Vape and Go Vaping Harmless. Vape aerosol contains toxic chemicals like formaldehyde, arsenic, lead, chromium, and nickel. They damage lungs. They harm developing brains. They raise cancer risks. We What's in a vape? Don't Get Sucked In This is what you're actually inhaling when you vape. (Hint: It's not water vapor.) E Liquid Tutorial 3: How to select Quality E Liquids HiLIQ Blog