Sources of Vitamin B12 FoodMicrograms per servingPercent DV* Beef liver, cooked, pan-fried, 3 ounces70.72,944 Clams (without shells), cooked, 3 ounces17708 Nutritional yeast, fortified, from several brands (check label), about ¼ cup8.3 to 24346 to 1,000 Salmon, Atlantic, cooked, 3 ounces2.6108 14 more rows Dec 22, 2022