The test shows an average of the blood sugar level over the past 90 days and represents a percentage. Blood HbA1c levels are reflective of how well diabetes is controlled. Hba1c Test Chart Hemoglobin A1c Check Hba1c Normal Range Levels Meaning Full Form Hemoglobin is a protein only found in red blood cells. . Hemoglobin A1c HbA1c has been accepted as an index of glycemic control since the mid-1970s and is the best marker for diabetic microvascular complications. New hemoglobin enters circulation with minimal glucose attached. Hemoglobin A1c AHS G2006 File Name. Hemoglobin is the part of your red blood cells that carries oxygen from your lungs to the rest of your body. HbA 1c has been described as insensitive for diabetes screening compared with the oral glucose tolerance test OGTT in CF 5 8. If you currently have diabetes your A1c goal may be 8 or lower. A hemoglobin A1c HbA1c test measures the amount of b...