The term liver function test (LFT) refers to a group of blood tests frequently used to assess the liver's health. This test gauges the liver's production of proteins and enzymes such lactate dehydrogenase, albumin, and bilirubin. It is suggested if you experience indications of a liver condition such as black urine, diarrhoea, light stools, and jaundice. Liver cirrhosis, hepatitis, and liver damage are just a few of the disorders that can be diagnosed thanks to LFT. Additionally, it is suggested to people receiving treatment for liver problems. Renal function tests help us in determining your kidney function. Kidneys help in filtering waste materials from your body in the form of urine. Samples required for a RFT are either a blood sample, urine sample or both. Symptoms indicative of kidney dysfunction are painful urination, blood in urine or frequent urination. RFTs might also be done to rule out an infection.