The nutritional functions of minerals include: ① Minerals are important components of animal tissues. Calcium, phosphorus and magnesium are the main components of bones and teeth; Phosphorus and sulfur are important components of protein.

② Minerals play an important role in maintaining the osmotic pressure of body fluids and acid-base balance.

③ Minerals are necessary to maintain the normal function of nerves and muscles.

④ Minerals are the components of hormones, vitamins, protein and various enzymes.

⑤ Minerals are components of preserved egg products.