Liver blood tests and liver-function markers, including ALT, AST, GGT, bilirubin and alkaline phosphatase. Explore available tests with reference ranges and context for abnormal results.
Kidney, electrolyte, autonomic, cardiac, liver, or nervous-system-adjacent markers often need symptom timing and pacing context to become useful.
What this category can do
Liver blood tests and liver-function markers, including ALT, AST, GGT, bilirubin and alkaline phosphatase. Explore available tests with reference ranges and context for abnormal results.
Pacing
Pacing makes biomarkers and symptom timing more actionable in everyday management.
Open heart-rate pacingPEM
When symptoms escalate later rather than immediately, a recovery-oriented reading becomes more important.
Open PEM durationWhitepapers
The whitepapers connect physiology, longitudinal interpretation, and Elara’s monitoring logic.
Open whitepapersIf this category is not enough
A category page organizes markers, but many users are actually trying to answer broader questions about fatigue, PEM, pacing, or structured symptom documentation.
Questionnaires
Use validated assessments when a biomarker category alone is too narrow for the underlying question.
PEM
When symptoms worsen after activity, the timing pattern can matter more than a category label.
ME/CFS
Use the illness hub when reduced capacity, fatigue, or multisystem symptoms are part of the larger picture.
Adjacent categories
Alkaline phosphatase (ALP) is an enzyme found in several tissues, mainly the liver, bone, kidneys, and bile ducts. The test measures ALP levels in the blood and helps screen for liver or bone disorders.
Reference: 40 - 130
AST is an enzyme found in the liver, heart, muscles, and kidneys. It is measured to detect tissue damage, particularly to the liver.
Reference: 0 - 50
Total bilirubin is a yellow pigment from red blood cell breakdown. Its blood level helps evaluate liver function and bile flow.
Reference: 0 - 1.1
Direct (conjugated) bilirubin is bilirubin processed by the liver and ready for excretion. Elevated levels suggest liver or bile duct issues.
Reference: 0 - 0.3
Indirect bilirubin is the unconjugated form of bilirubin produced during the breakdown of red blood cells. It is measured to help assess liver function and hemolysis.
Reference: 0 - 0.8
GGT is an enzyme found mainly in the liver and bile ducts. Elevated levels can indicate liver or bile duct damage.
Reference: 0 - 60
GLDH is an enzyme released into the blood when liver cells are damaged. Measuring GLDH helps assess liver injury, especially in cases of acute hepatitis or toxic liver damage.
Reference: 0 - 7
Haptoglobin is a protein made by the liver that binds free hemoglobin in the bloodstream, preventing iron loss and oxidative damage.
Reference: 30 - 200
Common liver-related tests include ALT, AST, GGT, alkaline phosphatase and bilirubin. The overall pattern is usually more informative than any single value.
Elevated liver-related results can have many causes, including fatty liver disease, medicines, alcohol, viral infections or bile-duct problems. A single result does not identify the cause by itself.
There is no single best liver test for every question. ALT is relatively liver-specific, while AST, GGT, alkaline phosphatase and bilirubin add information about the liver and bile ducts.
