Want to make sure I get my facts straight before I look into this - you were or you were NOT on winny at the time the bloods were drawn?
I see that
@mdhx3 already covered this in great detail and with awesome info...he forced me to go research cyastatin-c as I did not know much about it. It seems cyastatin-C isn't just more accurate at detecting decline in kidney function, but it is also cheaper than the precise GFR tests (injecting inulin, radioisotopes, or radio contrast agents, etc.) that the eGFR is used in place of due to their price and difficulty. Its a no-brainer. I gotta add this one to my arsenal, especially if I have a muscle bound guy come in.