“One hour of shisha is like smoking about 40 cigarettes, UAE doctors warn." (Post caption: "One hour of shisha can expose users to smoke comparable to that from around 40 cigarettes, UAE doctors warn.")”

The attribution checks out. The headline and figure come from a real Khaleej Times health article. An hour-long shisha session can be like smoking 40 cigarettes, said Dr Mohammed Fawzi Katranji, a pulmonologist at Dr Sulaiman Al Habib Medical Group, warning that many users do not consider themselves smokers at all, and he said the belief that shisha is safer because the smoke passes through water has no scientific basis. He was speaking at the "Quit Like Sweden: The Swedish Experience" conference, and he also said there is a need for better local research comparing long-term risks. A release from the same event repeats the figure: "One shisha session can equal more than 40 cigarettes." The underlying science supports the direction of the warning but not a settled number of 40. Smoke volume. In a typical one-hour hookah session, users inhale approximately 90,000 mL of smoke, substantially more than the smoke from one cigarette at 500 to 600 mL; one session contains roughly 200 puffs, exposing users to 3 to 6 fold higher levels of carbon monoxide and 46 fold higher levels of tar than a single cigarette. A peer-reviewed respiratory review states the volume of smoke inhaled during a single waterpipe session is 50 to 100 times the smoke inhaled from a single cigarette. The Cleveland Clinic describes a typical one-hour session as inhaling 100 to 200 times the volume of smoke from a single cigarette. Nicotine absorption, a different and much smaller multiple. Meta-analysis found daily waterpipe use produced a 24-hour urinary cotinine level corresponding to a nicotine absorption rate equivalent to smoking 10 cigarettes per day (95% CI 7 to 13). Even among non-daily users, a single session produced a urinary cotinine level equivalent to smoking two cigarettes in one day. Per-session machine-smoking data put a single waterpipe session at about 46 times the tar, 6.5 times the CO and 1.7 times the nicotine of one cigarette. The "water filters it" myth. WHO states that waterpipe tobacco use damages health in ways similar to cigarette tobacco use, that it is often wrongly believed the smoke is purified by passing through the water, and that waterpipe tobacco use is not a safe alternative to cigarettes with no proof that any device or accessory makes it safer. Numbers quoted by UAE doctors have varied enormously over time. The same newspaper previously published "One hour of shisha smoking is equal to smoking 40-400 cigarettes and it exposes the smoker to 100-200 times more smoke inhaled from one cigarette", and a Dubai Health Authority-linked report quoted "Smoking shisha for just one hour amounts to smoking 200 cigarettes". A separate Khaleej Times piece quoted a doctor saying "Smoke inhaled in one hour of shisha can equal up to 100 cigarettes."