Liver Function Tests
A panel of blood markers — including ALT, AST, ALP, and bilirubin — used to get a general picture of how the liver is functioning.
This is educational information, not a diagnosis. Only a doctor reviewing your full report and history can properly interpret your result.
What It Is
Liver function tests (LFTs) are a group of blood markers measured together, most commonly ALT, AST, ALP, GGT, bilirubin, and albumin. Rather than one single number, the panel is read as a pattern across several values.
Why It Matters
Because the liver plays a central role in metabolism, detoxification, and digestion, changes in these markers can be an early signal of strain — from fatty liver to medication effects — often before any symptoms appear.
Typical Reference Range
Reference ranges vary between labs and are usually printed alongside your result on the report itself. As a general guide, ALT and AST are often reported in the region of roughly 7-56 U/L and 8-48 U/L respectively, though units and cutoffs differ by laboratory.
What Can Affect Your Results
- Diet and alcohol intake
- Body weight and visceral fat
- Certain medications and supplements
- Viral infections affecting the liver
- Intense exercise shortly before testing
When It's Typically Checked
Liver function tests are commonly included in routine annual blood work, and are checked more closely when fatty liver, medication use, or unexplained fatigue is being evaluated.
Related Tests
Medical Disclaimer
This page is provided for general educational purposes only and does not diagnose, treat, or interpret your individual results. Reference ranges vary between laboratories and testing methods, and a result outside a ‘typical’ range does not necessarily indicate a health problem, just as a result inside it doesn’t rule one out. Only a qualified physician reviewing your complete health picture can properly interpret your lab results — please discuss your reports with Dr Naturals or your treating doctor rather than relying on this page alone.