3) Spinach - Spinach helps increase your metabolism, since it's loaded with vitamin C, vitamin B, magnesium, and iron. The high levels of iron found within the leafy green vegetable, helps the blood deliver oxygen quicker to the cells. Spinach can be added to salads, soups, stews, and even blended into a smoothie drink. There was a very good reason why Popeye ate his spinach!
4) Bananas - Bananas are extremely high in potassium, which aids in converting the digested sugar into energy. Bananas contain a wide spectrum of essential vitamins and omega fatty acids that give you the needed energy to stay awake. They also prevent dehydration, which is a very common cause of fatigue. Sliced bananas go well with oatmeal or cold muesli.