Your doctor can assess how well your kidneys are functioning by checking the creatinine levels in your blood and comparing them to the normal range. [1] Creatinine can be produced by the body ...

Use of the old formula(s) with a serum creatinine level determined using modern methods, therefore, leads to overestimation of the GFR by about 10–20%. 6 With regard to the gold-standard GFR ...