A tu mas nieco o CO a PAH
Hookah pipes have a reputation for being the lesser of evils when it comes to smoking options, and from certain perspectives, this is true. Smoking a hookah doesn't have to mean smoking tobacco or taking in nicotine, which are common substances associated with smoking. But hookah smoking has its own demon — combusted charcoal — which carries health risks even when non-tobacco shisha is used.
When charcoal is burned to create the hookah effect, it releases chemicals in the process, namely carbon monoxide (CO) and polyaromatic hydrocarbons (PAH). In addition to inhaling byproducts of the shisha, waterpipe smokers also inhale fairly large quantities of these combustion-related toxins — a hidden health risk associated with hookah smoking, even for non-tobacco shisha.
One recent study found that in a typical hookah smoking session, participants inhaled more carbon monoxide than someone who smokes a pack or more a day of conventional cigarettes. While hookah tobacco (or non-tobacco shisha) can be bought with very trace amounts of nicotine, or even be tobacco-free, most hookah devices are solely designed for charcoal burning to be the mechanism of inhalation. Tobacco tends to burn more slowly than many of the fruit and molasses contents in non-tobacco shishas. And so, while it is true that you aren't inhaling tobacco smoke, the sustained burning of the charcoal carries the risk of extended exposure to these chemicals. Even at low levels of exposure, both CO and PAH have corrosive and carcinogenic properties, just like most combustion by-products.
Hookah smokers in particular, can be exposed to:
Charcoal or wood cinder combustion products, which can increase the amount of cancer and heart disease causing agents in the smoke;
Additional smoke inhalation, compared to cigarette smokers, due to both the typical length of time spent smoking hookah as well as the second hand smoke from others in the vicinity;
Communicable diseases spread through saliva