Liver health
Fibrosis-4 index (FIB-4)
Combines age, AST, ALT and platelet count to estimate the likelihood of advanced liver fibrosis.
Understanding the result
It is a risk assessment tool, not a direct measurement of scarring or a diagnosis by itself.
Reading your report
Use the units, method and reference interval on your laboratory report. Your clinician can interpret the result alongside your history and other findings.
Sources & further reading
Educational summary · September 2026