there could be a few things going on. did you change or alter your medication (if you are on medication)? also as you say a1c is an average over 3 months so how you were eating the two months prior makes a difference it's also possible your carbohydrate intake was lower before starting the diet and the increases changed your blood sugar. i would see a diabetes educator while you work at getting to the right weight for you. they can help guide you in the process. good luck!
on nurtisystem for 35 days lost 20 pounds a1c from 6. 0 to 8. 1. . after being on the nutrisystem diabetic program for men for 35 days and losing a total of 20 pounds my a1c went from 6. 0 to 8. 1. i am 5' 7" and a current weight of 177. 2 pounds? why would my a1c increase? was it due to the previous 3 months?