Update to my last post.... For the past 6 months I'be been on a strict diet and execise program (down 75 pounds!). During that time I've measure my blood sugar before and after every meal as well as before and after exercising so I'd say I have a pretty extensive set of samples for the GB app to use in calculating A1C. Yesterday I had my A1C taken at my doctor's office and it came in at 6.1 (vs 9.8 six months ago) whereas the calculated value in the GB app has been running 5.2. It just demonstrates that while the app calculation is good for tracking trends (it acurately showed my A1C rising slightly after going off Amaryl a few months ago), if you want the TRUE value then nothing substitutes for a lab test.
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