A recent study published in the American journal "Psychology" points out that eating low-glycemic index foods for breakfast helps to improve learning ability. Low-glycemic index foods mainly include the following 5 categories:
1. Lean protein. 2. Nuts. Especially nuts rich in omega-3 fatty acids, such as walnuts, pecans, and cashews. 3. Fresh fruits. 4. Vegetables. 5. Whole grains. Whole grains such as oats, red beans, and mung beans help control blood sugar.