While e cigarettes, or vapes, may contain fewer chemicals than regular cigarettes, they are still NOT safe. E cigarettes contain harmful chemicals. 99% of e cigarettes contain nicotine, making them highly addictive. Visit https: t.co 1y8cZxtgFQ to Toxicity of electronic cigarettes: A general review of the origins, health hazards, and toxicity mechanisms ScienceDirect High concentrations of flavor chemicals are present in electronic cigarette refill fluids Scientific Reports Content and quantity of the chemical substances in e cigarette Download Table Flavour chemicals, synthetic coolants and pulegone in popular mint flavoured and menthol flavoured e cigarettes Tobacco Control Truth About E Cigarettes and Vaping: Are They Safer Than Smoking for Lung Cancer Risk?