B12.
People taking certain medications: Long-term use of some medicines, including metformin and acid-reducing medications, may be associated with lower B12 levels.
People with pernicious anemia: This autoimmune condition interferes with the body’s ability to absorb vitamin B12 properly.
Which Foods Contain Vitamin B12?
A balanced diet can provide vitamin B12, particularly when it includes suitable animal-derived foods.
Good dietary sources include:
Fish and seafood.
Beef and other meats.
Eggs.
Milk and yogurt.
Cheese.
Foods fortified with vitamin B12, such as certain breakfast cereals and plant-based milk alternatives.
People following a vegan diet should check food labels carefully because not
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