Thank you for asking your query at DoctorSpring.
The GFR here is eGFR (or estimated GFR) which is actually calculated using an equation from the S.Creatinine. So if the creatinine is high the eGFR will be low.
There is no reason to be alarmed, but at same time you cannot ignore it attributing to the weight training. Weight training can cause high levels, but it has to be made sure it is weight training and nothing else.
I would recommend a repeat testing after 4-5 days without any weight training or vitamin supplement . Take a regular diet on these days. If it is still elevated it will need evaluation. (Theoretically it should come down, if normal).
The value should not be evaluated in isolation. I wonder what the indication for the test is. Any symptoms? Or routine ? What about the S.BUN / Urea and Urine Routine examination ?
You may reply as a followup
Hope this helps
Patient replied :
Thank you for your response. Everything youre saying makes perfect sense. Ill do exactly that. Im not having any sort of symptoms that prompted the testing. It was just routine blood lab (changing Life Insurance companies). I dont see anything on my lab results about S.BUN. My Blood Urea Nitrogen was 21.00 MG/DL. My Creatinine was 1.65 MG/DL. Im also seeing a second Creatinine test result on the back of the paperwork stating 266.00 MG/DL with a lab range of 10-300. Obviously this is different than the other one but possibly worth mentioning. Thank you SO much!
Thank you for providing the additional information.
The Blood Urea Nitrogen is also just above normal. (20 mg/dl) is normal. So definitely a repeat testing of RFT (Renal Function tests – S.Creatinine and Blood Urea Nitrogen ) is warranted. Stay well hydrated.
The other Creatinine should be Urinary Creatinine as a part of the micro albuminuria testing. So that is not significant here.