Vitamins are vital substances necessary for healthy cell function, growth, and development. The 13 essential vitamins are Vitamin A, Vitamin C, Vitamin D, Vitamin E, Vitamin K, Vitamin B1 (thiamine), Vitamin B2 (riboflavin), Vitamin B3 (niacin), Pantothenic Acid, Biotin, Vitamin B6, Vitamin B12, and Folate (folic acid). Vitamins are categorized into two groups: fat-soluble and water-soluble vitamins. Fat-soluble vitamins consists of vitamin A, D, E, and K, these vitamins are able to stay in the body system for a prolonged time. Water-soluble vitamins consists of the other nine essential vitamins that must be used immediately by the body or is wasted during urination. Vitamin B12 is the only water-soluble vitamin that can be stored within the body, and is able to last the liver for many years. Each vitamin is responsible for various job role, crucial for overall general health.