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Mineral functions and sources. Calcium:  needed for healthy bones and teeth, normal blood clotting, and nervous system functioning.  sources: dairy products, broccoli, cabbage, kale, tofu, sardines and salmon.
Key points. 1  Minerals are inorganic substances required by the body in small amounts for a variety of different functions. 2  Minerals are involved in the formation of bones and teeth; they are essential constituents of body fluids and tissues; they are components of enzyme systems and they are involved in normal nerve function.