Vitamins are organic compounds that people need in small quantities. Most vitamins need to come from food because the body either does not produce them or produces very little of them. Some people don't get enough vitamins and minerals in their diet so they will take a multi-vitamin. In humans, vitamins serve several biochemical functions, including the regulation of cellular growth, hormone production, metabolism, and a cofactor in several internal reactions.
Minerals are naturally occurring chemical compounds that take on various properties, but the body only requires a select few to support biochemical functions. The major minerals in the body include calcium, phosphorus, potassium, sodium, and magnesium. Other minor minerals, also known as trace minerals can usually be obtained from drinking water from the tap or eating certain vegetables, but in some cases, a nutritional deficiency can occur as a result of intake from specific sources of fluids or foods.