Liver Function Test (LFT)
A group of blood tests that measure substances made by your liver.
Liver Function Test (LFT)
A group of blood tests that measure substances made by your liver.
Also known as
- LFT
- Liver panel
What it measures
- Albumin and total protein
- Liver enzymes (ALP, ALT, AST, GGT)
- Bilirubin
Why a doctor may order it
Often ordered as part of a routine checkup, and when there are symptoms that could point to liver problems — for example nausea, fatigue, jaundice (yellow skin or eyes) or dark urine. It may also be advised if you have risk factors for liver disease.
What it helps evaluate
It can help a doctor check how well the liver is working and look for signs of liver disease or damage.
Preparation
Your provider will tell you how to prepare. Certain medicines can affect results, so tell your provider about everything you take, and don't stop any medicine unless told to.
Fasting
MedlinePlus says you will probably need to fast for 10 to 12 hours. Your provider or the lab will tell you.
Important considerations
- Many things can change liver test values, so results are read alongside your symptoms and history.
Discuss results with your doctor
Talk to a doctor about your symptoms and about what your results mean — a single result is not a diagnosis. See a doctor promptly for severe or worsening symptoms.