Minerals are single elements that are necessary for the structure of bones, blood, hair and nails. They are also catalysts for enzymes to create chemical bonds to form new tissue or break bonds to liberate energy. Certain hormones cannot function without minerals, for example insulin cannot efficiently move glucose into cells without chromium. Minerals are categorized into those of which we need more than 100mg. per day, calcium, magnesium, sodium, chloride and sulfur; and trace minerals that we need smaller amounts of, boron, chromium, copper, iodine, iron, manganese, molybdenum, selenium, silicon, vanadium and zinc. Minerals should be taken with food, like vitamins, as they are food derivatives and are better absorbed along with other nutrients in meals, and will sit better in the stomach.