An oyster primer from Gourmet, including a list of some of the most reliable varieties. It's oyster season and now's the time to enjoy one of my favorite foods. Oysters contain more zinc per serving than any other food, and lots of B12. They don't have omega-3 fatty acids like fish though, so don't count them as part of your twice a week fish serving. My favorite way to eat them is raw, but fried oysters also have a special place in my heart.