The Short Answer
Each pint of blood contains 250 mg of iron bound to hemoglobin. Phlebotomy forces your body to rebuild red blood cells, pulling iron from storage deposits in your liver and organs. One session per week removes 250 mg of iron; most patients reach safe ferritin levels (50–100 ng/mL) in 6–12 months, halting organ damage [1][9].
When you lose blood, your bone marrow urgently produces new red blood cells to restore oxygen-carrying capacity. This process demands iron—lots of it. Your body mobilizes stored iron from the liver, heart, and pancreas to feed this demand. Over weeks and months, iron deposits shrink as your body recycles iron from phlebotomy sessions instead of absorbing more from food [1][9]. Ferritin levels drop predictably: roughly 30–50 ng/mL per phlebotomy session in the induction phase.
Phlebotomy is remarkably safe and cheap. A standard blood donation removes 450 mL (one pint) in 5–10 minutes. Side effects are minimal—mild fatigue or dizziness in 5% of patients, easily managed with hydration and iron-rich snacks. Your body regenerates red blood cells within 2–4 weeks, so you can safely repeat phlebotomy every 1–2 weeks [1][9]. Compare this to chelation therapy (iron-binding drugs costing $2,000–$5,000 monthly) or organ transplant ($100,000+).
Maintenance phlebotomy is lifelong but simple. Once ferritin reaches 50–100 ng/mL, most patients need only one session every 2–4 weeks to stay in the safe zone. Ferritin is checked every 3 months to adjust frequency. Insurance covers phlebotomy as medically necessary treatment; many blood banks offer it free or at reduced cost because the blood can be donated to patients needing transfusions [1][9].