Understanding Alpha-Fetoprotein (AFP): Normal vs Optimal Ranges
Also known as: afp, alpha-fetoprotein level, afp level
?What is Alpha-Fetoprotein (AFP)?
Alpha-fetoprotein (AFP) is a protein produced primarily by the fetal liver and yolk sac during pregnancy, and normally decreases to very low levels after birth. In adults, elevated AFP levels can be associated with liver disease, hepatocellular carcinoma, germ cell tumors, and certain other malignancies. AFP is commonly used as a tumor marker to screen for and monitor liver cancer and reproductive tract cancers.
!Why It Matters
Abnormal AFP levels may suggest the presence of liver cancer, germ cell tumors, or other malignancies, and can be valuable in early cancer detection and treatment monitoring. In pregnant individuals, AFP measurement is part of routine prenatal screening to assess fetal health and detect certain genetic abnormalities. Tracking AFP trends over time is often more clinically meaningful than a single measurement.
Reference Ranges
| Range Type | Min | Max | Unit | Note |
|---|---|---|---|---|
| Lab Normal | 0 | 10 | ng/mL | Standard lab reference range |
| Optimal | 0 | 5 | ng/mL | Evidence-based optimal range for health |
| Longevity Target | 0 | 5 | ng/mL | Per longevity medicine research (Attia et al.) |
Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.
Symptoms of Imbalance
- Unexplained abdominal swelling or distension
- Persistent abdominal pain or discomfort
- Unexplained weight loss
- Jaundice or yellowing of skin and eyes
- Fatigue and weakness
How to Improve Your Levels
- 1Seek medical evaluation if elevated; treatment depends on underlying cause
- 2Manage underlying liver disease through appropriate medical care
- 3Maintain a healthy lifestyle to reduce liver cancer risk
- 4Avoid excess alcohol consumption to protect liver health
- 5Follow recommended cancer screening protocols if at high risk
- 6Attend regular medical check-ups for monitoring if levels are elevated
When to Test
AFP testing is recommended for individuals with known risk factors for hepatocellular carcinoma (such as cirrhosis or chronic hepatitis B/C), those with a family history of liver cancer, pregnant individuals as part of prenatal screening, and individuals with suspected germ cell tumors or other malignancies.
Related Biomarkers
Track your Alpha-Fetoprotein (AFP) with ByoMap
Upload your blood report and get personalized Alpha-Fetoprotein (AFP) ranges based on your age, sex, and ancestry — free.
Try Free — Upload Your Report