Abstract
Vitamins are organic substances that humans require in trace amounts. Each plays a distinct part in preserving physical well-being. To increase their supply, some people require supplements; however, this is dependent on their lifestyle and general health. Vitamins are necessary nutrients of the body's healthy growth and operation. Vitamins are divided into two classes: fat and water soluble. Inorganic elements, known as minerals, are derived from food and cannot be produced by the body. Collecting all types of vitamins in a study their sources, functions, excess and deficiency. They have an effective role in the body’s metabolism and immunity and in combating most diseases that affect the human body. Balancing them in moderate concentrations in the human body protects against the risk of contracting many diseases that affect adults and children. Therefore, every individual must take adequate food. It contains all types of vitamins, and in case of deficiency, it is compensated with manufactured vitamins.