Polycyclic aromatic hydrocarbons (PAHs) are cancer-causing chemicals found in crude oil that can accumulate in the food chain, absorbed by fish and shellfish.
Polycyclic aromatic hydrocarbons them selves do not cause caner. Your body metabolizes them into other chemicals, those other chemicals cause cancer. This is done by a class of enzymes called P450's. You ca inhibit (block) those specific P450s from metabolizing those PAHs by drinking dark beers when you ingest those PAHs (resulting in your just peeing them out).
Yes, drinking beer (darker the better) is good for your health!
Science is great when it is fully used, not just to scare people!
I am free of all prejudice. I hate everyone equally. - W. C. Fields