3. Complex Carbohydrates
Complex carbohydrates are the primary source of energy for the body. For an adequate amount of energy, you can eat starchy foods, vegetables, fruits and whole grains. Especially during the physical activities, carbohydrates affect the synthesis of glycogen to delay tiredness. Also, the complex carbohydrates that are rich in serotonin, which regulates sleeping habits and improves mood, help maintaining blood glucose level.