Balancing which minerals in dairy diets supports bone development?

• A. Calcium and Phosphorus
• B. Sodium and Potassium
• C. Iron and Zinc
• D. Magnesium and Manganese

Answer: (A)

Bone development relies on balancing calcium and phosphorus because these minerals form the hard mineral part of bone. Calcium provides the core mineral, and together with phosphorus they create calcium phosphate (hydroxyapatite), which gives bone its strength. When dairy diets provide these two minerals in proper levels and proportion, bone mineralization during growth and development proceeds effectively. Other minerals have important roles in metabolism—sodium and potassium for fluid balance and nerve function, iron and zinc for growth and immune function, and magnesium and manganese in bone metabolism—but they do not supply the primary mineral content of bone. Therefore, balancing calcium and phosphorus in dairy diets best supports bone development.