Why Are E Cigarettes Safer Than Cigarettes Vape Blog Study: 1 in 5 Believe E cigarettes Have Less Harmful Chemicals Heated Tobacco Products, Cigarettes, and E Cigarettes: What's the Difference PMI Science Nothing good comes from smoking , and vaping isn't a safe alternative. E cigarettes often contain nicotine and other harmful substances, and studies show that young people who vape are more likely to