HbA1c, also known as the glycosylated hemoglobin test, is one of the three blood cells normally found in the human body. The three main types of blood cells are red blood cells, white blood cells, and platelets. Hemoglobin helps red blood cells stay red. This hemoglobin is of many types. of HBA1, HBA2, HBF, and HBS Most of the human body contains a high percentage of hemoglobin called HBA1, and an organ called the pancreas produces insulin in the human body. But in diabetes, the pancreas does not produce insulin. Therefore, sugar levels increase in people with diabetes if the glucose levels in the blood increase in the body. This glucose goes and sticks to the hemoglobin on top of the red blood cells in the blood. Then they are called glycosylated hemoglobin. When hemoglobin takes up glucose levels, the hemoglobin is called glycated hemoglobin. glycosylated hemoglobin percentage by the HbA1c test, we can know how much is in the blood.