Via Sullivan, science has discovered how to keep your grilled meat from killing you:
Now comes some better news. Scientists have found that marinating pork in beer--yes, beer--can reduce the level of carcinogens. According to this study, black ale has the most beneficial qualities, reducing eight types of PAHs by 53%, compared to meat that hadn't been soaked at all. Nonalcoholic Pilsner beer was also useful, showing a 25% reduction, followed by Pilsner (13%). Each piece of meat was marinated for four hours.
This welcome advice was the result of some serious experiments, as Dr Ferreira explains in a paper in the Journal of Agricultural and Food Chemistry. The PAHs created by grilling form from molecules called free radicals which, in turn, form from fat and protein in the intense heat of this type of cooking. One way of stopping PAH-formation, then, might be to apply chemicals called antioxidants that mop up free radicals. And beer is rich in these, in the shape of melanoidins, which form when barley is roasted. So Dr Ferreira and her colleagues prepared some beer marinades, bought some steaks and headed for the griddle.
One of their marinades was based on Pilsner, a pale lager. A second was based on a black beer (type unstated). Since black beers have more melanoidins than light beers—as the name suggests, they give it colour—Dr Ferreira’s hypothesis was that steaks steeped in the black-beer marinade would form fewer PAHs than those steeped in the light-beer marinade, which would, in turn, form fewer than control steaks left unmarinated.
And so it proved. When cooked, unmarinated steaks had an average of 21 nanograms (billionths of a gram) of PAHs per gram of grilled meat. Those marinated in Pilsner averaged 18 nanograms. Those marinated in black beer averaged only 10 nanograms. Tasty and healthy too, then. Just what the doctor ordered.
Next time I'm at Morton's, I'll expect to see the porter-marinated Porterhouse on the menu.