Too lax on refined grains. The guidelines say that it’s okay to eat up to half of our bread, cereal, rice, pasta, and other grain foods in their fiber- and nutrient-depleted, refined forms. That’s unfortunate, because in the body, refined grains like white bread and white rice act just like sugar. Over time, eating too much of these refined grain foods can make it harder to control weight, and can raise the risk of heart disease and diabetes.