Exhaled carbon monoxide with waterpipe use in US students

(Disponible en anglais seulement.)

Twenty-seven students smoked water pipes for an hour on three different evenings; another five students didn't smoke the hookahs but stayed in the room with those who did. Researchers monitored carbon monoxide in the breath of the participants both before and after the experiment. Exhaled carbon monoxide in participants was an average of 42 parts per million, higher than that reported in cigarette smokers (17 parts per million).

http://jama.ama-assn.org/cgi/content/short/299/1/36-a?rss=1

Comment: More research needs to be done on the dangers of waterpipe use due to the increased use of it among young adults, especially in Western countries.