Refined carbs lack nutrients and can wreak havoc on your blood sugar. Whole grains are best; have four small daily portions of whole-wheat bread, or try a pasta made from quinoa. And always eat grains with healthy fats and protein. Incorporate sprouted or fermented grains (hello, sourdough!) for easier digestion and better nutrient absorption. Or look for creative ways to swap out grains, such as using spaghetti squash in place of noodles.