Minerals are inorganic substances that cannot be synthesised by our bodies, making the body reliant upon the dietary intake. Minerals actively participate in regulating a wide range of physiological functions, including transporting oxygen to cells and in the general upkeep of the central nervous system. Minerals are also required for growth, maintenance, repair and the health of bones and tissues. Minerals are divided into two main groups, macro minerals and trace elements, the only criteria for this being the amount required by our bodies. Generally any mineral required in amounts of less than 15mg per day in the diet are classified as trace elements. Marginal mineral deficiency is relatively widespread in the UK both among adults, children and adolescents.