Vitamins. Normally, a healthy person who eats a balanced diet will get all the vitamins needed. Vitamins are classified as natural or synthetic. The body uses both in the same way.
The International Olympic Committee Medical Commission, in their effort to deal with Doping in the sports world, has developed three fundamental principles;
The NCAA has a drug-testing program that mandates urine collection and analysis on specific occasions.
Several professional athletic teams have written policy statements concerning the use of banned substances.