Age 65 w/fem. serum creatinine 1.02. bun 8. ratio 8. egfr down from 70's to 58. took zantac (ranitidine) 150 32 hrs. prior to blood test. no health concerns. ckd?

I don't think so: With a BUN of 8, anybody worried about their kidneys should be very happy. The lack of real science behind the "EGFR" promotion is showcased by the adjustment for race "because black people are more muscular." Many of us in pathology think this is an attempt by Big Pharma to make healthy people think they are sick. I'd be glad for good health. Creatine's fine for your age. Best wishes.