Refined grains are high-glycemic, meaning they have a dramatic impact on your blood sugar. According to the Neuropathy Association, glycemic control is the No. 1 strategy for preventing the progression of neuropathy associated with diabetes, which is one of the most common causes. To improve the glycemic impact of your diet, replace refined grains and products — including white and wheat bread, enriched pasta, white and instant rice, low-fiber cereals and processed snack foods, such as pretzels, potato chips and crackers — with whole grains. Nutritious options include oats, barley, brown rice, quinoa and air-popped popcorn.