Those are awesome results! I'm hoping my next A1C will be below 5 (last one was 5.3).
I also think it's great that your doctor is willing to work with you and let you try things that are unconventional. Metformin is sometimes used with type 1 diabetics, though...to help decrease their insulin requirements.



Sadly that is still the recommendation for diabetics...under 7 is acceptable. I'd like to see that recommendation lowered so that the expectation for diabetics is to achieve normal A1c's instead of "good enough for a diabetic" A1c's. It probably won't happen for a long time, though, since there are a lot of diabetics following the traditional ADA diet that are struggling to even get their A1c's under 7 and it's because of that doctors feel that getting it under 7 is doing great.