Haptoglobin
Haptoglobin is a protein made by the liver that binds to free hemoglobin released from destroyed red blood cells. It is used to detect and monitor hemolytic anemia.
Category: Liver Function
Also known as: haptoglobin, hp, hapto
Reference range: 30–200 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High haptoglobin may indicate infection, inflammation, tissue damage, rheumatoid arthritis, or certain cancers.
Low values may indicate
Low haptoglobin may indicate hemolytic anemia, sickle cell disease, transfusion reactions, or chronic liver disease.
Frequently asked questions
- What is a normal Haptoglobin level?
- A typical reference range for Haptoglobin is 30–200 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Haptoglobin measured in?
- Haptoglobin is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Haptoglobin reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Haptoglobin over time?
- Yes. Upload results from any lab and BloodId charts your Haptoglobin over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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