In situations when the body cannot use glucose for energy, such as in the case with diabetes, cells turn to as an energy source.

Cells use proteins and fats in this case

Depends on which disease, but as a general rule eat healthy. many vegetables.                                                        hope my answer has come to your . you for posting your question here in we hope to answer more of your questions and inquiries soon. have a nice day ahead! : )     (p.s mark as brainliest if )