A recent study from Duke University shows that caffeine increases blood sugar levels in diabetics who regularly drink coffee.
These findings are surprising because coffee contains no calories and has a glycemic index of 0. However, caffeine is a stimulant similar to the fight-or-flight response. The fight-or flight response causes a rise in blood sugar.
Proteins are the natural choice when a patient is faced with diabetes. If diabetes is uncontrolled, muscle protein is broken down into amino acids and converted into glucose by the liver. Proteins have to supply enough energy to substitute for carbohydrates and proteins are broken down faster than they are made. If this happens the body ends up with a protein deficit which affects normal body functions.