Vitamins are organic compounds that are essential for normal growth and nutrition. They are divided into water soluble and fat soluble vitamins. Water soluble vitamins such as vitamin C are not stored in the body, while fat soluble vitamins like vitamin A can be stored. Vitamins play important roles like aiding in carbohydrate metabolism, blood cell formation, and tissue repair. Sources of vitamins include foods like meat, dairy products, fruits and vegetables. A lack of vitamins can lead to deficiencies and diseases.