Is Iqos Less Harmful Than Cigarettes La Fume Did you know that tobacco in IQOS is heated and not burned? Researchers say that heat not burn devices are only slightly less harmful to Vaping Alternative: IQOS For A Smoke Free Lifestyle Faut il tre jeun pour une prise de sang? How are Non Combusted Cigarettes, Sometimes Called Heat Not Burn Products, Different from E Cigarettes and Cigarettes? FDA