Hemoglobin and hemoglobin a1c, what's the difference?

Anemia vs diabetes: A hemoglobin is measured to screen someone for anemia. A hemoglobin a1c is measured to screen for diabetes or to evaluate a person known to have diabetes. They are quite different, though certain disorders of hemoglobin type can also alter how one should interpret an a1c value.

Diabetic measure.: The HgbA1C is a measure reflective of your degree of diabetic control in the long term. It essentially represents a three month average of your fingersticks, as if you took a fingerstick every minute, night and day, eating and fasting, for three months straight and then averaged them all. Technically, it's the percentage of red blood cells that have glucose attached to them.