Low EGFR

Hi I'm 43 year old female 140lbs 5"7- Just got a blood test and the EGFR is flagged low at 58- (reference range is 70)
and Anion Gap is also low at 5.7 (reference range 6-18).  I am currently taking metformin once a day as a preventive for diabetes- (had gestational diabetes but not diabetic now). No other medications. Should I be concerned?

[Londres70]

The Metformin is not a "preventive" for Diabetes; it is a treatment for Diabetes, thus, you are Diabetic.  

Is this your first abnormal reading?  Any other renal labs or testing ordered?

I would be somewhat concerned.  

[nslope]

My Endocrinologist that I was seeing for thyroid issues put me on the Metformin- She said that i am pre-diabetic and this will help me and hopefully prolong my getting diabetes. Regardless- this is my first abnormal reading on the EGFR but my second abnormal on the Anion Gap.

[Londres70]

Further renal labs and/or testing needs to be done, i.e. serum renal panel, 24 Hr Urine test, etc.    

[Kimaya]

I guess metformin is working because when the egfr is 60 mean you have chronic kidney disease,  its good that you done your egfr blood test and got to know this earlier.