Maybe you should have picked the right parents before you were born. Just kidding, of course. The body is complex and we are stuck with the genes we were given. Sometimes there is no explanation for why "a" works for one person and not another.
My wife got a monitor on her own and measured sugar to see what was most effective and what seemed to affect her the most in either direction. That was very useful in diet adjustments and routine.
One reason for doing that was her A1C was on the high side, even after her glucose tests got to normal. The A1C by itself should not be the determining factor for a couple of interesting reasons.
Thx...yeah, those “genes”....I have been thinking about getting a monitor...I would like to know WHICH foods make it spike, or if it is Lack of food...like they are telling me...(hyperglycemia) My A1c was 5.4 I think, which I think is a little high....Did your wife find a decently priced monitor on her own, or thru insurance?