Dietary taboos for diabetic patients: Avoid eating: white sugar, red sugar, glucose and sugar sweets, such as fructose, pastries, jam, honey, preserves, ice cream, etc. Eat less: potatoes, yams, taro, lotus root, onions, carrots, lard, mutton fat, cream, butter, peanuts, walnuts, sunflower seeds, egg yolks, liver, kidneys, and brain.