Researchers say heat-not-burn devices are only slightly less harmful to your health than traditional cigarettes. They note that these heated products can cause damage to blood vessels and create other health issues.

Is IQOS better for your lungs?

Conclusion IQOS is associated with significant pulmonary and immunomodulatory toxicities with no detectable differences between conventional cigarette smokers and those who were switched to IQOS in Philip Morris International's studies.

Is IQOS more harmful than cigarettes?

There is a limited amount of research on the effect of IQOS on the user's health. ... According to Netherlands National Institute for Public Health and the Environment, IQOS is "harmful to health, but probably less harmful than smoking tobacco cigarettes".