Volunteer blood donors give about 500 mL of whole blood, approximately 10% of their total blood volume. After removal of plasma during processing, each mL of packed red blood cells contains 1 mg of iron. Thus, 200–250 mg iron are removed from the donor at each donation depending on their haematocrit. Since average iron stores are only 250 mg in women and 1000 mg in men, repeated donation produces iron deficiency in many donors.¹ Iron deficiency induced by blood donation has potential for untoward effects, including impaired neurocognitive development in teenagers or in the fetus of a donor who becomes pregnant.

中文翻译：

---

血液价格以铁衡量

自愿献血者提供约500毫升全血，约占其总血量的10％。在处理过程中除去血浆后，每毫升填充的红细胞中含有1毫克的铁。因此，每次捐献时都会根据捐献者的血细胞比容从捐献者身上除去200-250毫克的铁。由于女性的平均铁存储量仅为250毫克，男性为1000毫克，因此反复捐赠会导致许多捐赠者体内铁缺乏。¹由献血引起的铁缺乏症具有潜在的不良影响，包括青少年或怀孕供体的胎儿神经认知发育受损。