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Generally speaking, normal creatinine level ranges from 0.5 to 1.1 mg/dl for female and 0.6 to 1.2 mg/dl for male. It is possible that the normal creatinine level for people with only one kidney is a little higher.
The blood test, called GFR, measures how much blood your kidneys filter each minute. Your doctor uses this information to see how well your kidneys are working. A GFR of over 60 means your kidneys are working fine.A GFR of 60 or lower may mean you have kidney disease.he blood test, called GFR, measures how much blood your kidneys filter each minute. Your doctor uses this information to see how well your kidneys are working. A GFR of over 60 means your kidneys are working fine.