Vitamin deficiency anemias. In addition to iron, your body needs folate and vitamin B-12 to produce sufficient Numbers of healthy red blood cells.

(营养性)巨幼细胞性贫血(维生素缺乏性贫血)为了制造足量、健康的红细胞，除了铁以外，身体还需要叶酸和维生素b12等原料。

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This is because the vegan diet is rich in a vitamin called folate, which may mask deficiency in vitamin B-12 until severe problems occur.

这是因为严格素餐富含一种名为叶酸的维生素，它能够在检验中掩盖维生素b - 12的缺乏症状直到出现严重的病症。

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Vitamin B-12 deficiency can result from a diet lacking in vitamin B-12, which is found mainly in meat, eggs and milk.

CNN: Vitamin deficiency anemia

Vitamin B-12 deficiency anemia can also occur if your small intestine can't absorb vitamin B-12.

CNN: Vitamin deficiency anemia

Vitamin B-12 deficiency anemia caused by a lack of intrinsic factor is called pernicious anemia.

CNN: Vitamin deficiency anemia