A Clear FIB-4 Calculator Guide to AST, ALT and Platelets
FIB-4 calculator math is simple, yet in one US study 10% of low-risk results were not low risk on stiffness testing. See what that means.
FIB-4 calculator math is simple, yet in one US study 10% of low-risk results were not low risk on stiffness testing. See what that means.

FIB-4 above 1.3 flags a second test, not a diagnosis. Over 65 the cutoff is 2.0, and age alone can lift the score

An AST/ALT ratio above 2 points to advanced liver injury more than drinking: 64% of 313 people in alcohol withdrawal had a ratio of 1.0 or less.

High AST with normal ALT often points beyond the liver. See how ACG guidance sorts muscle, heart and hemolysis causes by test.

High AST levels that are only mildly raised are common, per Mayo Clinic. Know which symptoms mean you should not wait to retest.

The AST normal range on your report may differ from what you read online: about 1 in 20 healthy people fall outside it.

AST blood test results can come from liver, muscle or heart, so one number cannot show where the rise began. Here is how to read yours.

Jaundice and high liver enzymes can occur together, and the eyes yellow first. Learn how to check in natural light and what tests find the cause.

Diabetes liver enzymes were elevated in 40.2% of 51,645 adults in one registry, and few had a fatty liver diagnosis. See what to ask.

At home liver test numbers need context: ACG puts healthy ALT at 29–33 IU/L for men and 19–25 IU/L for women.