Why is Alpha-fetoprotein (AFP) Low? Causes, Symptoms, and What to Do
Learn about low Alpha-fetoprotein (AFP) levels, what causes them, and when to see a doctor.
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is below the typical adult range (0–10 ng/mL).
is within the typical adult range (0–10 ng/mL).
is above the typical adult range (0–10 ng/mL).
This number is very far from the usual range - check which unit your report uses.
A value this far outside the range is worth discussing with your doctor today.
What a high result usually means
The range printed on your own report comes first - it differs between laboratories. This is not a diagnosis.
See it next to the rest of your report - upload it for a free, private explanationFree. Sign up with your email - no password, we send you a code.Alpha-fetoprotein (AFP) is a protein that is typically produced by the liver and yolk sac of a developing fetus. In adults, AFP levels are usually very low. Understanding why AFP levels might be low is important, especially if you're reviewing lab results that show unexpected values.
What is Alpha-fetoprotein (AFP)?
Alpha-fetoprotein (AFP) is a protein produced primarily by the liver in a developing fetus. In adults, AFP levels are generally low, typically less than 10 ng/mL. AFP is often measured in pregnant women to assess fetal health and in adults as a tumor marker for certain cancers. Elevated levels can indicate liver cancer or germ-cell tumors, while low levels are generally less concerning.
Causes of Low AFP Levels
Low AFP levels are generally not a cause for concern in non-pregnant adults. In fact, having an AFP level of less than 10 ng/mL is considered normal for this group. During pregnancy, low AFP levels can sometimes be associated with certain conditions like Down syndrome in the fetus, but this is typically assessed alongside other markers and diagnostic tests.
Why Low AFP Levels Matter
While low AFP levels are not typically a concern in non-pregnant adults, understanding these levels can be important in specific contexts. For example, during pregnancy, low AFP levels might prompt further testing to rule out certain fetal conditions. In adults, AFP is more commonly monitored for elevated levels rather than low levels, as high AFP can be indicative of liver cancer or other conditions.
What to Do if Your AFP Levels are Low
If your AFP levels are low and you are not pregnant, it is generally not a cause for concern. However, if you are pregnant and have low AFP levels, it may be part of a broader screening for fetal health. In such cases, your healthcare provider might recommend additional tests to ensure everything is progressing normally.
Frequently asked questions
What is the normal range for AFP in adults?
For non-pregnant adults, the typical AFP level is less than 10 ng/mL.
Can low AFP levels indicate cancer?
Low AFP levels are generally not associated with cancer. It is elevated AFP levels that are used as a tumor marker for liver and germ-cell cancers.
What should I do if my AFP levels are low during pregnancy?
Low AFP levels during pregnancy may require additional screening to assess fetal health. Consult your healthcare provider for further evaluation.
Are there symptoms associated with low AFP levels?
Low AFP levels do not typically cause symptoms. They are a lab finding rather than a symptom-producing condition.
How is AFP measured?
AFP is measured through a blood test. The results are usually reported in nanograms per milliliter (ng/mL).
When to see a doctor
If you are pregnant and your AFP levels are low, consult your healthcare provider for further evaluation and potential additional testing. For non-pregnant adults, low AFP levels are typically not a concern. However, if you have any questions or concerns about your lab results, it's always a good idea to discuss them with your doctor.
Disclaimer: This information is for educational purposes only and any medical decisions should be made in consultation with your healthcare provider.