Good dietary habits go along way in preventing fatigue. Carbohydrate drinks during competition are not really necessary and can cause gastrointestinal distress. It is not necessary to take dietary supplements to acquire success as an athlete or maintain a healthy life style. Nutritional deficiencies are not associated with sports training or exercise. With this in mind common sense dictates that supplementing beyond the intake of normal food and drink is not necessary.
Most claims made by supplement manufactures are anecdotal.
Tests on supplements for quantity and purity indicate many supplements fall short of manufactures claims. All claims of this nature are completely unfounded. The supplement industry is poorly regulated, so buyer beware. Some supplements even contain ingredients that are on the banned drug list and can cause an athlete to test positive on a drug test . Not only are dietary supplements not necessary they are expensive.