Liver, explained
ALT, AST, GGT, ALP, bilirubin and albumin. A mildly high ALT is common — we explain when it matters.
Three things we do that a printed range doesn’t
Ranges change with both. We use the set for you — 26 range sets in total.
Values change each other’s meaning. We show the links, not just the list.
IFCC C-RIDL, NORIP (Nordic Reference Interval Project). Organisation, document, year.
ALT — the ranges we use
EASL: an elevated level indicates liver strain (fatty liver, alcohol, viruses, medications).
| Rating | Range | What it means |
|---|---|---|
| Good | below 33 U/L | Liver with no signs of strain. |
| Worth improving | 33 – 50 U/L | Slightly elevated — often fatty liver; lifestyle. |
| Talk to a doctor | 50 U/L and above | Elevated — check your liver; seek advice. |
This marker also has 2 age- or sex-specific range sets in the app — the table shows the general one.
Articles in this guide
- Blood chemistry tests: normal values for ALT, AST, GGT, CRP, CK, creatinine and glucoseReading your report
- High bilirubin: what it means and how to spot Gilbert's syndromeMarker explained
- Liver tests (ALT, AST, GGT): what they mean and how to help your liverMarker explained
- Alkaline phosphatase (ALP): what high or low levels meanMarker explained
- Fatty liver: what raised liver enzymes mean and what FIB-4 isLiver
- Albumin blood test: what low or high albumin meansMarker explained
- Biological age: what it is and how to slow it downSupplements & longevity
- Blood biomarkers of metabolic health: what to measure and whyMetabolic health
This content is for information only and is not a substitute for medical advice. Talk to your doctor about your results.
Good to know
ALT 46 — is that a problem?
Upload your report and you’ll see the answer for your exact value, age and sex — with the source of the range. In general: one value outside the printed range is rarely an emergency; the pattern and the trend matter more.
Do I need a new test?
No. Upload the one you already have. If a re-test is useful, the plan tells you when.
Is this a diagnosis?
No. It is an explanation to help you and your doctor. When a value needs a doctor, we say so.