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Graph demonstrating the change in serum creatinine over 4 weeks. A serum creatinine of 198 µmol/L corresponds to an estimated glomerular filtration rate (eGFR) of 33 mL/min, a serum creatinine of 227 µmol/L corresponds to an eGFR of 28 mL/min and a serum creatinine of 104 µmol/L corresponds to an eGFR of 70 mL/min. Note that patient stopped taking bodybuilding supplements at approximately 2 weeks, resulting in the decrease in serum creatinine, and the subsequent increase in eGFR.
