Taking a Science driven Approach to Address the Vaping Threat NHLBI, NIH E liquide Relax 50 ml Eliquid France, e liquide saveurs classic, caf et cookie Le Petit Vapoteur E liquide Bloody Summer Esalt Fruizee YouVape Vapes VS. Cigarettes, Which One Is Safer? Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health.