Often, many athletes, as well as people who are highly interested in sports, use supplements before and after they perform exercises. The following is a review of the importance and benefits of using supplements:

- These are products intended to supplement a person's food requirement if the food programme does not cover sufficient nutrients.
- Supplements are no substitute for food. It's to supplement the imperfect need.
- Dietary supplements are vitamins, minerals, fibers, amino acids and fatty acids.
- Dietary supplements are useful and healthy in contrast to hormones and harmful steroids, which have an adverse effect on the destruction of human hormonal balance.
- Athletes use supplements to improve athletic performance and public health.
- A sports person needs supplements bigger than a normal person.
- Dietary supplements are of several kinds by purpose, whether muscle mass gain, weight loss, hospitalization or energy access.
- Vitamins or minerals do not cause weight gain because vitamins and minerals do not contain calories.
In the case of a downweight diet, it is recommended to take supplements of vitamins and minerals because it is difficult to obtain all the needs of the body because it helps compensate the body for vitamins and minerals in excellent proportions after analysis to ensure that there is a shortage of vitamins and minerals in the body...
- Vitamins enter fat and carbohydrates, grease burning and muscle building.
- Lack of vitamins or minerals disrupts an enzyme or hormone that has to do with growth and weight gain. The enzyme or hormone regains physiological activity in the presence of vitamin or minus metal.

Dietary supplements thus affect exercise performance, and contribute to improving athletes' health and diet.