When insulin levels have been high for a long time, our cells start becoming resistant to insulin. Insulin resistance is the root cause of type 2 diabetes: liver, muscle, and fat cells need larger and larger quantities of insulin to take up the same amount of glucose. Eventually, the system doesn’t work anymore. Glucose is no longer stored away as glycogen, even though our pancreas produces growing quantities of insulin. The result is that the glucose levels in our body are increased for good.
