Hemoglobin A1c or HbA1c or the A1C test is a blood test that is meant to measure your average blood
sugar over the past three months. So, what does that mean? Well, your sugar that is in your blood,
from the sugar (glucose) that you ate is not meant to be stuck to your hemoglobin.
If you have enough sugar in your blood, it can stick to the hemoglobin and that’s when we call the hemoglobin “hemoglobin A1C”. We also have a term for the sugar being stuck. We call the hemoglobin “glycated”.
That means that the sugar is attached without the use of enzymes. The bottom line in all of this is that, if you have enough sugar in your bloodstream, it increases the odds of hemoglobin finding it and it sticking to hemoglobin, therefore increasing the concentration of hemoglobin A1c.