The importance of iron for whole blood donors: a Canadian perspective
professionaleducation.blood.ca
This updated article examines the effect of blood donation on donor iron levels and the steps taken by Canadian Blood Services to protect the health of its donors. In 2023, Canadian Blood Services started ferritin testing in select frequent donors at the highest risk of iron deficiency.
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The original was posted on /r/todayilearned by /u/ProudReaction2204 on 2025-02-02 00:37:11+00:00.

Original Title: TIL 35% of whole blood donors become iron-deficient (defined as ferritin levels of below 25 µg/L). Daily iron supplementation (37 mg of iron) for at least 8 weeks after is expected to replenish iron loss from one whole blood donation.