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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.
Glomerular filtration rate (GFR) indicates how well the kidneys are working. The higher GFR, the better kidneys function. However, once you are tested out low GFR, for example your GFR level is 5ml/min, you must wonder âwhat does low GFR meanâ. Generally, our GFR level ranges between 90 and 120ml/min, but these values may change with age.