← Blood tests
CA 15-3
Specialistalso —
What it isA glycoprotein shed by breast cancer cells, particularly metastatic disease.
DoesMonitors treated breast cancer for recurrence; not a screening test.
GoodLow CA 15-3 in someone with treated breast cancer signals disease control.
BadRising CA 15-3 in treated breast cancer flags recurrence; also rises in benign breast and liver conditions.
- Standard
- <38 U/mL.
- Optimal
- 0–38 U/mL (lower is good)
- Modifiers
- Rises with liver disease.
How to optimize
- Lifestyle
- —
- Diet
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- Supplements
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- Peptides
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- Drugs
- Cancer-directed therapy when indicated.
Reference ranges are general adult lab norms; optimal ranges are editorial picks from the longevity literature — not medical advice. Always interpret results with your physician.
within Cancer Markers