There are 16 essential minerals: calcium, phosphorus, potassium, sulfur, sodium, chloride, magnesium, iron, zinc, copper, manganese, iodine, selenium, molybdenum, chromium, and fluoride. These minerals play an important role in maintaining blood pressure, electrolyte and fluid balance in body and bone health. They deliver oxygen to cells, making new cells in the body and contributing to normal muscle development and nerve functioning.