”The signs and symptoms of Cushing syndrome can vary depending on the levels of excess cortisol.  Cortisol also helps your body respond to stress and regulates the way you convert (metabolize) proteins, carbohydrates and fats in your diet into usable energy. However, when the level of cortisol is too high in your body, you may develop Cushing syndrome with its complications.”

NIH National Institute of Diabetes and Digestive and Kidney Diseases (U.S. Department of Health and Human Services)