Juul Vapes Remain on Market While Appeals Court Reviews FDA Ban Let's talk vaping. Smokeless doesn't mean harmless. Most e cigarettes contain nicotine which is highly addictive and can harm adolescent brain development, which continues into the early mid 20's. Some e cigarettes can even The Smoking Alternative, unlike any E Cigarette or Vape JUUL JUUL Labs The Rise (and Stumble) of the E Cigarette Giant