Health Effects of Vaping Smoking and Tobacco Use CDC 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 High concentrations of flavor chemicals are present in electronic cigarette refill fluids Scientific Reports The Truth about Vaping Vaping: How E cigs Work (Infographic) Live Science VAPING, NICOTINE, TOBACCO