Basic or comprehensive metabolic tests: Tests for blood sugar, electrolyte balance, and kidney function. Typically, people will be asked to fast for 10 to 12 hours before having one of these tests.

Is fasting required for KFT test?

A KFT test is a blood test which does not require any preparation per se. Though, a Kidney function test may require overnight fasting.

Is fasting required for LFT and KFT?

You may need to fast (not eat or drink) for 10-12 hours before the test.