@susangail53 I wonder if you could have a Cystatin C done. The creatinine base, my nephrologist says, is affected by many things (including muscle loss) and the Cystatin C version of the eGFR for me has been higher and more stable. My doctor says the truth may lie somewhere in the middle but the Cystatin C was encouraging at a time when my other eGFR was 36.