B12 in Foods VITAMIN B12


Beef, cooked, 3 oz (90 g) 2.8 mcg

Pork, center loin, cooked, 3 oz (90 g) 0.5 mcg

Poultry breast, cooked, 5 oz (150 g) 0.3 mcg

Tuna, canned and drained, 3 oz (90 g) 2.5 mcg

Mussels, cooked, 3 oz (90 g) 20 mcg

Milk, 1 cup (250 ml) 0.9 mcg

Yogurt, 3/4 cup (175 ml) 0.9 mcg

Cottage cheese, 1%, 1/2 cup (125 ml) 0.7 mcg

Cheddar cheese, 1.5 oz (45 g) 0.3 mcg

Egg, 1 whole 0.6 mcg

Fortified soy beverage, 1 cup (250 ml) 1.0 mcg

Fortified rice beverage, 1 cup (250 ml) 1.0 mcg

Nutrient Values of Some Common Foods, Health Canada, Ottawa, 1999.

B12 in Foods VITAMIN B12 Photo Gallery

B12 Supplements

If you are a strict vegetarian who eats no animal products and you don’t drink a fortified soy or rice beverage, I strongly recommend a B12 supplement. In fact, anyone over the age of 50 should be getting their B12 from a supplement or fortified foods. That’s because up to one-third of older adults produce inadequate amounts of stomach acid and are inefficient at absorbing B12 from food.

If you take certain medications you should consider taking extra B12 in the form of a supplement. If you suffer from reflux or ulcers and take acid blockers (e.g., Tagamet®, Zantac®, Pepcid®) your body may not absorb enough B12 (as well as iron). Metformin®, used to manage type 2 diabetes and polycystic ovary syndrome, can also deplete B12 levels. If you take these medications, your doctor should monitor your blood periodically for signs of anemia.

To get your B12, I recommend a good multivitamin and mineral supplement or a B complex supplement that contains the whole family of B vitamins. If you take a single B12 supplement, take 500 to 1000 micrograms once daily.

If you are taking a high-dose B12 supplement to correct a deficiency, don’t take it with a vitamin C pill. Large amounts of vitamin C can destroy B12. Take your vitamin C supplement one hour after you take your B12.

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