National Nutrition Month March - Get Your Plate in Shape?. A great time to highlight 2 powerhouse foods kale and potato. As the theme for March 2012 National Nutrition Month is "Get Your Plate in Shape". Benefits of Kale is This food is low in Saturated Fat, and very low in Cholesterol. It is also a good source of Dietary Fiber, Protein, Foliate, Iron, Magnesium and Phosphorus. Potato Benefits The Potato provides two key nutrients that Americans are lacking ? Fiber and Potassium.