hsHgb A1c is a marker of insulin resistance and when it is elevated, that means the body is no longer properly managing blood sugar levels. When this number is elevated, that also strongly suggests a tendency toward higher inflammation throughout the body. The graph below represents the correlation between Hgb A1c levels, blood glucose levels, and 10 year survival probability. Research has shown that insulin resistance and prediabetes can frequently be improved with diet and exercise. Hgb A1C provides a reliable test to evaluate the effects of dietary and nutritional support programs.