← Blood tests
Transferrin
Routine annualalso —
What it isTransferrin is the liver-made protein that carries iron through the bloodstream. Direct measurement of transferrin parallels TIBC.
DoesTransports iron from gut and recycled red cells to bone marrow and tissues.
GoodMid-range transferrin signals balanced iron transport.
BadRises in iron deficiency; falls in chronic disease, inflammation, malnutrition, and liver failure.
- Standard
- 200–360 mg/dL.
- Optimal
- 240–320 mg/dL (narrow target)
- Modifiers
- Same as TIBC.
How to optimize
- Lifestyle
- —
- Diet
- Adequate protein for liver synthesis.
- Supplements
- —
- Peptides
- —
- Drugs
- Treat underlying cause.
Reference ranges are general adult lab norms; optimal ranges are editorial picks from the longevity literature — not medical advice. Always interpret results with your physician.
within Iron