A meal rich in carbohydrates can lead to a spike in the blood sugar level. Insulin is secreted by the pancreas to help get glucose out of the blood and into the cells where it can be used to produce energy.
However, in people suffering from type 2 diabetes, the process doesn’t work well. Their body becomes resistant to the action of insulin and thus insulin is not as effective at moving the glucose out of the blood. Therefore, one ends up with a blood sugar spike in their blood after eating carbohydrates.
To reduce the high blood glucose, the body makes more insulin. Insulin has one more function, which is to store fat and block the release of fat from fat storage. Thus, it becomes difficult for diabetics to lose weight.