One other way of fighting fatigue is by getting balanced nourishment. Iron in foods such as spinach, raisins, liver, etc., can enable easy transport of oxygen in the blood to the different tissues. One cause of fatigue is lack of oxygen in the body. B complex vitamins such as pantothenic acid, folic acid, thiamine, and vitamin B12 can be found in fortified cereals, beef, chicken, turkey, fish, egg, milk, and shellfish such as clams and crab. Deficiency in these vitamins and minerals can result to fatigue and other problems. And of course, control your food intake. An overstuffed stomach can also cause short-term fatigue.

Source: Psychology Today