Nothing sort of
There is a form of hemoglobin which is called glycated hemoglobin.
The amount or % of this hemoglobin can and is used as a measurement of average blood sugar
over time (life of the red cell). This is the a1c test. In non-dabetics the value is 5.5% or below. I like to see diabetics in the 6.5% range to consider them good control. This is a simple answer with a lot more to it. Google it.