Keto dieters should avoid sugars, grains, starchy vegetables , fruits that are high in carbs or sugar , and most processed foods. Some keto dieters avoid beans and legumes, as they are generally high in carbs, while others eat certain varieties in small amounts. Whether its because of the benefits of eating high fat and low carb, or because you feel justified in eating cheese all day long, keto has officially become one of the hottest diets around.