UIBC (Unsaturated Iron Binding Capacity)
UIBC measures the portion of transferrin not currently bound to iron and equals TIBC minus serum iron. It rises in iron deficiency and falls in iron overload or chronic inflammation. UIBC is often reported together with serum iron and TIBC to calculate transferrin saturation and give a fuller picture of iron balance.
6 of 22 providers
Vitamins &Nutrients
110-370 μg/dL
What is UIBC (Unsaturated Iron Binding Capacity)?
UIBC measures the portion of transferrin not currently bound to iron and equals TIBC minus serum iron. It rises in iron deficiency and falls in iron overload or chronic inflammation. UIBC is often reported together with serum iron and TIBC to calculate transferrin saturation and give a fuller picture of iron balance.
Why It Matters
Measures unused iron-binding capacity. High UIBC indicates iron deficiency;low suggests iron overload. Used with TIBC to calculate transferrin saturation.
Which Providers Test UIBC (Unsaturated Iron Binding Capacity)?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | — | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | — | $349 | 65 |
 Labcorp OnDemand | — | $398 | 40+ |
| ✓ | $486 | 40+ | |
| — | $449 | 288 | |
| ✓ | $349 | 100+ | |
| — | $829 | 54 | |
 Function Health | — | $365 | 160+ |
| — | $250 | 65 | |
| — | $495 | 80+ | |
| ✓ | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| — | $375 | 95+ | |
| — | $Varies | 75+ | |
| — | $190 | 100+ | |
| — | $99 | 50 | |
| — | $124 | 60 | |
| — | $349 | 130+ | |
| — | $349 | 80+ | |
| ✓ | $375 | 85 | |
| ✓ | $700 | 128 | |
| — | $99 | 100+ |
Frequently Asked Questions
What is UIBC (Unsaturated Iron Binding Capacity)?
UIBC measures the portion of transferrin not currently bound to iron and equals TIBC minus serum iron. It rises in iron deficiency and falls in iron overload or chronic inflammation. UIBC is often reported together with serum iron and TIBC to calculate transferrin saturation and give a fuller picture of iron balance.
What is the optimal range for UIBC (Unsaturated Iron Binding Capacity)?
The standard reference range for UIBC (Unsaturated Iron Binding Capacity) is 110-370 μg/dL. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include UIBC (Unsaturated Iron Binding Capacity)?
6 out of 22 blood testing providers include UIBC (Unsaturated Iron Binding Capacity) in their panels. This biomarker is widely available across major providers.
What category does UIBC (Unsaturated Iron Binding Capacity) fall under?
UIBC (Unsaturated Iron Binding Capacity) is categorized under Vitamins &Nutrients. This category includes biomarkers that help assess related aspects of health and wellness.
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Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12