datlas 

So here is the medical lesson for the day.

The HbA1C is the percentage of your red cells' hemoglobin that have a glucose (sugar) molecule covalently bonded to it.

Thus, it is expressed as a percentage. Typical "normal" numbers are from the upper 4's to upper 5's. If you have diabetes you generally want 7% or less. Although it's a percentage, I have never seen a number higher than 18% and even 9 or 10% is quite high/bad.

The benefit of this test is that the more traditional glucose/sugar number is quite variable, this one reflects the average sugar level for the previous 3-4 months.

Unless you have diabetes or borderline sugar numbers, you don't really need to get this test.

/end lecture