What Happens if You Swallow Vape Juice? EDGE Vaping Vaping Nicotine = Brain Poison for Teens Tackling Tobacco Tuesday! Did you know Many people think that vapes contain harmless water vapour? They actually emit an aerosol made up of toxic particles. The liquid used in vapes, known as ' Vapes are often sold in sweet flavors and colorful packaging that appeal to teens. But here's the truth: They contain addictive nicotine that can harm the developing brain. Some products All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center