Which increases blood insulin levels

When you eat something there is post prandial spike in blood glucose which increases blood insulin levels .

Normally insulin is able to push these elevated glucose to inside of cell but in diabetes due to resistance they fail to do so . Therefore reason of postprandial hyperglycemia is decreased peripheral glucose uptake .

In fasting of more than 8 hours : you have not eaten anything still there’s hyperglycemia which can only be due to IMPAIRED liver function causing increased Gluconeogenesis .