Does beer have protein in it?

Yes, beer contains protein. The amount of protein in beer can vary depending on the type of beer, but on average, a 12-ounce serving of beer contains about 0.5 grams of protein. This protein comes from the barley and wheat used to make beer, as well as from the yeast that is used to ferment the beer. Beer also contains a small amount of amino acids, which are the building blocks of protein.