| Test | Conventional | SI | Threshold |
|---|---|---|---|
| Alanine Aminotransferase (ALT) | 7-56 U/L | 0.12-0.93 µkat/L | - |
| Albumin, Serum | 3.5-5 g/dL | 35-50 g/L | - |
| Alkaline Phosphatase (ALP) | 44-147 U/L | 0.73-2.45 µkat/L | - |
| Ammonia | 15-45 µg/dL | 11-32 µmol/L | - |
| Aspartate Aminotransferase (AST) | 10-40 U/L | 0.17-0.67 µkat/L | - |
| Bilirubin, Direct (Conjugated) | 0-0.3 mg/dL | 0-5.1 µmol/L | - |
| Bilirubin, Total | 0.3-1.2 mg/dL | 5.1-20.5 µmol/L | > 15 mg/dL in neonates (kernicterus risk) |
| Gamma-Glutamyl Transferase (GGT) | 8-61 U/L | 0.13-1.02 µkat/L | - |
| Total Protein | 6-8.3 g/dL | 60-83 g/L | - |
Panel
Liver Function (LFTs)
Transaminases, alkaline phosphatase, bilirubin, albumin, protein, and ammonia. 9 tests, 1 with a taught threshold.
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Frequently asked questions
What tests are in a Liver Function (LFTs)?
The Liver Function (LFTs) on this page lists 9 tests: Alanine Aminotransferase (ALT), Albumin, Serum, Alkaline Phosphatase (ALP), Ammonia, Aspartate Aminotransferase (AST), Bilirubin, Direct (Conjugated), Bilirubin, Total, Gamma-Glutamyl Transferase (GGT), Total Protein. Each is shown with its conventional and SI teaching reference range.
What does the Liver Function (LFTs) check for?
Transaminases, alkaline phosphatase, bilirubin, albumin, protein, and ammonia. These are educational teaching values - ranges vary by laboratory and method, and are not for clinical decisions.
Which Liver Function (LFTs) values are critical?
1 of the 9 tests in this Liver Function (LFTs) carry a taught threshold: Bilirubin, Total (> 15 mg/dL in neonates (kernicterus risk)). These are teaching thresholds, not clinical cutoffs - always use the values your laboratory reports.