Carbohydrate loading is a technique used to increase the amount of glycogen in the muscles. Loading up on extra carbohydrates during the week before a competition is meant for marathon runners and other elite athletes.
Protein is used to build muscle. Most people get plenty of protein from food. Getting extra protein from supplements will not have any added benefit.
Energy bars do not contain any magic ingredients that will help your athletic performance. Eating
regular food is just as good and usually costs less. However, energy bars are portable and convenient.
Vitamins and Minerals:
It is fine to take a multi-vitamin, but supplements with high doses of vitamins and minerals do not