An LFT is a simple blood draw, typically from a vein in your arm. The process takes a few minutes, and results are usually available within one to two days, sometimes sooner if the lab is in-house.
But liver function tests alone usually can't diagnose specific diseases. So, if your results are abnormal, you'll usually need other tests to find the exact cause. Other names: liver panel, liver function panel, liver profile hepatic function panel, LFT