Question 1

What does a raised ALT level mean?

Accepted Answer

ALT lives inside liver cells; when those cells are damaged, ALT leaks into the blood. Common causes of mildly raised ALT include fatty liver disease, alcohol use, some medications (paracetamol, statins), viral hepatitis, and intense exercise in the 24 hours before the test. Large elevations usually warrant a follow-up with your doctor.

Question 2

Is a slightly elevated ALT dangerous?

Accepted Answer

Not on its own. Many people have mildly raised ALT due to fatty liver — the most common liver condition in the Western world — which is often reversible with weight loss and reducing alcohol and refined carbohydrates. Your doctor will interpret ALT alongside AST, GGT, and other markers before drawing conclusions.

Question 3

Should I avoid exercise before an ALT test?

Accepted Answer

Yes — intense exercise in the 12–24 hours before blood work can transiently raise ALT (and AST) by releasing enzymes from muscle. If possible, keep it to light activity the day before your test for cleaner results.

Question 4

Can alcohol affect my ALT result?

Accepted Answer

Yes. Even a single heavy drinking session can raise ALT; chronic drinking causes sustained elevation. If you want a clean baseline, avoid alcohol for at least three days before testing.

Alanine aminotransferase (ALAT)

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