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Here are some of the best foods with B12: Clams, 3 ounces: 84 mcg 100% fortified breakfast cereal (check the label), 1 serving: 6 Trout, 3 ounces: 5.4 Salmon, 3 ounces: 4.9 Canned tuna fish, 3 ounces: 2.5 Fortified soy milk, chocolate (check the label): 1.7 Beef, 3 ounces: 1.5 Nonfat plain Greek yogurt, 6 ounces: 1.3 Swiss cheese, 1 slice: 0.9 Ham, 3 ounces: 0.6 Egg, 1 large: 0.6 Roasted chicken breast, 3 ounces: 0.3 Should you take a multivitamin

Morning administration is generally preferred as it supports daytime energy metabolism and fat oxidation

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Future studies using varied diets are needed to determine whether the predominance of Ileibacterium in the cecal microbiome holds pathological relevance