The benefits of following a healthy diet for prediabetics include weight loss and management, reduced risk for both Type 2 diabetes and cardiovascular disease, improved insulin resistance, and better control of blood sugar, according to Healthline. Risk reduces through managing carbohydrate intake and monitoring the glycemic effect of various foods.
The glycemic index determines the effect a particular food has on blood sugar, states Healthline. By following a diet emphasizing foods with a low-glycemic index, including whole grains, beans, nonstarch vegetables, corn and whole-wheat products, prediabetics can digest carbohydrates at a slower rate, which prevents spikes in blood sugar. Portion control plays a role in a healthy diet, and overweight or obese individuals should reduce food servings by half of the amount to which they're accustomed.