That is interesting. I was in the ED twice in the last 2 years for UTI, Covid, and sepsis. Both ED DRs were only concerned with creatinine #s, but my nephrologist always looks at eGFR. Aren't they related? A calculation of both? My BUN is around 30 and creatinine 2.2, eGFR 23 (but changes from test to test). Are these the numbers I should be concerned about? I drink a lot of water, 60+ oz a day. But my disease has me in a state of dehydration due to tubules not retaining water. My urine is always very light, like a light lemonade.