In diabetics, glucose can enter cells but is not effectively utilized through the Krebs cycle and electron transport chain for ATP production.

“it's not that glucose can't get into the cell in these tissues glucose can get into the in into the cells and diabetics it just can't be used it's not being used and so I have some studies that we can talk about here that basically show that in people with diabetes when you give them insulin or you put create hypoglycemia you'll increase the uptake of glucose but what you won't do is you won't increase the utilization of glucose through the kreb cycle and the electron transporting and the conversion ATP through that mechanism”