Whats the Difference Between an E Cigarette and a Dry Herb Vaporizer? How likely is your e cigarette to explode? Why Does My E cig Taste Burnt? TECC Blog Vegetable glycerin and propylene glycol and the burning of dry coils. What are 'heat not burn' products and are they any safer than traditional cigarettes? The Hidden Dangers: E Cigarettes, Heated Tobacco, and Their Impact on Oxidative Stress and AtherosclerosisA Systematic Review and Narrative Synthesis of the Evidence