Smoking hookah tobacco acutely impairs blood vessels' ability to function, according to preliminary research to be presented in Chicago at the American Heart Association's Scientific Sessions 2018. "Hookah is the only form of tobacco product that uses burning charcoal briquettes to heat the flavored tobacco in the waterpipe. So, in addition to toxic substances from tobacco and nicotine, hookah smoke exposes users to charcoal combustion products, including large amounts of carbon monoxide," said Mary Rezk-Hanna, Ph.D., study lead author [...]