Which minerals are most important for bone health, and what are common dietary sources?

• A. Calcium and phosphorus are critical; vitamin D is also important; sources include dairy, leafy greens, fortified foods.
• B. Iron and phosphorus are critical; vitamin C is also important; sources include meat, cereals.
• C. Potassium and calcium are critical; vitamin A is also important; sources include bananas, dairy.
• D. Zinc and magnesium are critical; vitamin K is also important; sources include seafood, leafy greens.

Answer: (A)

Bones get their strength from minerals embedded in the mineral matrix, with calcium and phosphorus being the major minerals that form the sturdy hydroxyapatite crystals in bone. Vitamin D plays a crucial supporting role by enabling the body to absorb calcium (and phosphorus) from the gut and by supporting proper mineralization of bone. So this choice reflects the most important minerals for bone health and the nutrient that helps us use them effectively, plus practical dietary sources.

In terms of sources, dairy products are rich in calcium and are a common and easily absorbed source. Leafy greens can also supply calcium, though absorption varies (greens low in oxalates, like kale or bok choy, are better choices than spinach for calcium absorption). Fortified foods—such as calcium-fortified dairy or plant milks, fortified cereals, and some fortified beverages—are important because they help ensure enough calcium and often vitamin D in many diets. This combination of calcium and phosphorus as the key minerals, with vitamin D supporting their use, aligns with how we typically build and maintain bone health.