A new fad among college students and other young people -- smoking from a hookah -- is raising public health concerns. The centuries-old tradition of smoking from a hookah, or waterpipe, is widely perceived to be less harmful and addictive than smoking cigarettes or other forms of tobacco. Yet a number of studies suggest that hookah smoking may be just as addictive and perhaps even more harmful because of the way people smoke while using a waterpipe, reports the March 2008 issue of the Harvard Mental Health Letter. Researchers have found that hookah smokers inhale more often and for longer periods than typical cigarette smokers. Scientists estimate that by puffing longer and in greater volume, a waterpipe smoker inhales the equivalent of 100 cigarettes or more during a single waterpipe session. Proponents of hookah smoking argue that it isn't necessary to inhale the smoke into the lungs. Instead they puff as if on a pipe -- and believe this reduces the health hazards. However, studies indicate that hookah smokers are absorbing high levels of toxins and carcinogens that may contribute to heart disease, lung cancer, and respiratory disease. And although some nicotine is filtered through the water contained at the base of the pipe, scientists conclude that waterpipe smokers are still exposed to enough nicotine to become addicted. Dr. Michael Miller, editor in chief of the Harvard Mental Health Letter, suggests that until more is known about how to help hookah smokers quit, clinicians and smokers should be aware of the potential dangers. Harvard Mental Health Letter

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