Vaping vs Smoking vs IQOS: Which is Least Harmful? All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center No, vapes aren't 95% less harmful than cigarettes. Here's how this decade old myth took off ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, Is Vaping More Harmful That Cigarettes? Anne Penman Laser Therapy