Why Normal Gfr Levels Might Actually Vary Based On Your Muscle Mass bejo 6909 Share Why Normal Gfr Levels Might Actually Vary Based On Your Muscle Mass What Is Normal Gfr In Blood Work at Jill Farris blog Table 1 from Diagnostic accuracy of cystatin C-based eGFR equations at ... Read also: Students Are Studying Where Is A Kidney Located In The Human Body