Nutritional anemia is caused by an inability to absorb enough ingested vitamin B₁₂ from the digestive tract.

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Nutritional anemia is most commonly caused by iron deficiency, although it can also be due to deficiencies in vitamin B12, folate, and other nutrients. Vitamin B12 deficiency specifically leads to a type of anemia called pernicious anemia, which is related to the body's inability to absorb vitamin B12 but is not the sole cause of nutritional anemia.

Nutritional Anemia Is Caused by an Inability to Absorb Enough