t you see if doc will order a "Cystatin c". It is MUCH more accurate for kidney function than crea, bun and gfr. That way you get an idea of your true renal function. If your doc wont order it (I dont see why he/she would say no when it is medically proven that its a more accurate measurement of renal function) then you could get it your self from https://www.privatemdlabs.com/ assuming you arent in one of the few states that doesnt legally allow us to buy our own blood work. Also, assuming you are in the USA.ll link a study to validate what I am saying. Id take 5k iu a day of gel tabs to get that raised up.