There is no conclusive evidence as yet to suggest how protein intake could assist those living with diabetes. However, a small study in 2017 found that including whey protein may help some people living with type 2 diabetes. The study found that whey protein stimulated insulin secretion in people with normal body weight and triglyceride levels. However, in those with obesity, it appeared to trigger increased glucose levels.
Protein shakes do provide for slow digestion when compared with carbohydrates. This reduces the chance of a blood sugar spike. You should be careful to ensure that your protein powder is sugar-free. Given that more research is required we would recommend a healthy balanced diet. If you wish to include protein powder as a regular part of your diet we also recommend seeking advice from a health professional.