INS and Hyperinsulinemia: When diets with high GI are consumed, a glycemic increase occurs due to the high level of glucose, leading to hyperinsulinemia.28 Different sources of carbohydrates have varying absorption rates, and their effects on plasma concentrations of glucose and insulin vary accordingly.29, 30 In the present study, both the intake of total fiber as well as of the insoluble fiber declined by the tertile.