A vitamin deficiency, or low levels of a vitamin in your blood, can be caused by diet or a malfunction in the way your body absorbs vitamins. Vitamin B-12 is naturally found in animal products. That ...
Vitamin B-12 plays an essential role in a person’s health. Vegetarian and vegan foods that contain vitamin B-12 can include fortified plant-based milks, fortified cereals, and nutritional yeasts.
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