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Just one session of heated tobacco product use results in measurable damage to the blood vessels, according to a study published today (Tuesday) in the European Journal of Preventive Cardiology.

Researchers carried out detailed assessments of blood samples, blood pressure and how well blood vessels functioned in healthy smokers before and after they used two tobacco sticks back-to-back in a tobacco heating device.

They say their results challenge claims that these products are substantially less harmful to the cardiovascular system than conventional cigarettes and highlight the need to consider all nicotine-containing products in public health policies.

The research was led by Dr. Lea Strohm from the University Medical Center Mainz, Germany. She said, "Heated tobacco products, such as IQOS, which heat tobacco rather than burn it, are often marketed as less harmful alternatives to conventional cigarettes. However, independent evidence on their immediate effects on cardiovascular health, and the body as a whole, remains limited."

The research included a group of 30 adult smokers, with an average age of 34, who were otherwise healthy. Participants gave blood samples, had their blood pressure measured and had their blood vessels assessed with an ultrasound scan of the main artery in the right arm. Participants then used a heated tobacco product, and the same set of tests was repeated.

Comparing measurements taken before and after use, the researchers identified several changes.

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