Fig. 4From: The effects of hookah/waterpipe smoking on general health and the cardiovascular systemComparison of the levels of some toxicant expelled in both hookah and tobacco smoke. Levels of the toxicants (a) tar, CO, (b) carbonyl compounds (formaldehyde and acetaldehyde), and (c) certain PAHs are indicated. Levels of toxicants in pack/day are extrapolated by multiplying the levels in one cigarette by 20 [71,72,73,74]Back to article page