Three months ago, my serum
creatinine was 0.89 and eGFR was 114. I got tested today, and the results show serum creatinine at 1.03 and eGFR at 97. I have been following a normal diet for these three months. My question is: why has there been such a change in creatinine and eGFR levels over this period? Is this something to be worried about?