AFP (Alpha-Fetoprotein)
Alpha-Fetoprotein (AFP) is a protein produced mainly by the liver of a developing fetus. In adults, this test measures AFP levels to help detect liver cancer, certain testicular cancers, and other co…
Category: Tumor Markers
Also known as: afp, alpha-fetoprotein, alpha fetoprotein, α-fetoprotein
Reference range: 0–8 ng/mL (Source: ABIM)
Standard unit: ng/mL
High values may indicate
High AFP levels may indicate hepatocellular carcinoma (liver cancer), germ cell tumors (testicular or ovarian), hepatitis, cirrhosis, or pregnancy.
Low values may indicate
Low AFP levels in adults are normal. In prenatal screening, low AFP may be associated with Down syndrome.
Frequently asked questions
- What is a normal AFP (Alpha-Fetoprotein) level?
- A typical reference range for AFP (Alpha-Fetoprotein) is 0–8 ng/mL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is AFP (Alpha-Fetoprotein) measured in?
- AFP (Alpha-Fetoprotein) is most commonly reported in ng/mL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do AFP (Alpha-Fetoprotein) 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 AFP (Alpha-Fetoprotein) over time?
- Yes. Upload results from any lab and BloodId charts your AFP (Alpha-Fetoprotein) 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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