How to Read Your Liver Panel

Alpha-1 antitrypsin is the liver-made protein that shields your lungs from their own enzymes. Its level rises during any inflammation, which is exactly why one normal number can hide an inherited shortage underneath.

One enzyme, two main sources, and a meter that sometimes sticks: why a raised amylase rarely settles the question on its own.

When alkaline phosphatase climbs, it could be your liver or your bones. 5'-nucleotidase is the second test that settles which one, without a scan.

One of the most handling-sensitive tests in the lab: the number can climb before the sample is ever measured.

Ceruloplasmin carries copper in the blood and is usually checked to investigate Wilson disease. The catch is that it can read normal even when something is wrong, which is why it is never interpreted alone.

The pancreatic enzyme that lingers: why only a marked rise carries weight, and why it can flag trouble long after the faster amylase has already faded.

Indirect bilirubin is the raw pigment from broken-down red cells, counted before the liver has processed it. A high reading points to one of two very different places, and the number itself isn't even measured directly.

One of the least specific numbers on your panel flags damage without saying where it came from. Here is how clinicians track the leak back to its source.

ALT is the enzyme liver cells spill when they are injured. The blood level counts that damage rather than how well the liver works, which is why a hard workout or a new pill can lift it.

AST is the less liver-specific of the two transaminases. It lives in the heart, muscle, kidneys, and red cells too, so a high reading on its own names no single organ.

GGT is the most sensitive of the liver enzymes and one of the least specific. A high reading says the liver or bile ducts, almost certainly. It rarely says which problem.

ALP comes from two places at once: the liver and bile ducts, and growing or remodeling bone. A high reading rarely says which, and a child's level runs two to three times an adult's by design.

Total bilirubin is the pigment left over when worn-out red blood cells are taken apart. A high flag is one of the most common abnormal liver results, and one of the least likely to mean trouble.

Direct bilirubin is the part the liver has already processed. When this fraction climbs, the holdup is downstream, at the exit rather than the supply.

Haptoglobin is the protein that mops up the hemoglobin spilled when red blood cells break apart. Read for the one result that warns you by running out, not by piling up.