Saliva cotinine and exhaled carbon monoxide levels in natural environment waterpipe smokers

(Disponible en anglais seulement.)
This study examined the variations in exhaled CO and saliva cotinine in natural environment waterpipe smokers and compared them with cigarette smokers and absolute non-smokers. Results confirm that, like cigarette smokers, waterpipe smokers are exposed to harmful substances, such as CO, which was found to be quite high.
http://dx.doi.org/10.1080/08958370701401699

Comment: There is a misconception that smoking from a waterpipe is less hazardous than cigarette smoking, and this study helps disprove that.