Supplementation can be used to satisfy your higher nutrition needs due to an increased workload or medical health condition. Your body may require more of certain vitamins or minerals due to medical issues, stress, or living an energetic life style. There are many types of supplements for your diet: capsules, tablets or powders, drinks and energy bars. Most people take nutritional supplements under the assumption that they will increase energy, maintain strength and improve performance, keep good health, and help prevent nutritional deficiencies.