CA 19-9
A pancreatic and biliary marker — best known for following known disease, and for reading high whenever bile is not draining properly.
What the numbers mean
These are the ranges BioForge works to. They are not the same as a lab's reference range, which is built from the general population rather than from people who feel well.
What moves CA 19-9
Rises sharply with any bile duct obstruction, with gallstones, pancreatitis, cirrhosis, and thyroid disease. About one person in twenty lacks the blood-group enzyme needed to produce it at all, so their result stays near zero even when disease is present.
Related markers in Immune & Cancer Screening Markers
This page is educational and is not medical advice. Ranges are general and do not account for your history, medications or symptoms — a single number never decides a protocol. Your results are interpreted by a licensed clinician alongside everything else about you. Back to the Learning Center
Want to know where your numbers actually sit?
Every BioForge protocol starts from your own bloodwork. The first 15-to-30-minute call is free.