What is GFR?

GFR refers to Glomerular Filtration Rate. Basically it measures your kidney function.  The unit is 'millilitres per minute'. It denotes how much blood your kidney can purify per minute. Normal value should be in between 100 -120 if you are young. Later ages it could be as low as 60 to be considered as normal. If the value is below that range, surely indicates error in kidney function or failure. Diabetic patients need to be careful as diabetes can lead to kidney failure.