The mineral crucial for maintaining strong bones is calcium. Calcium is a vital nutrient that supports bone density and structure, helping to prevent conditions like osteoporosis. It can be found in dairy products, leafy greens, fortified foods, and certain fish. Adequate calcium intake is particularly important during childhood, adolescence, and later in life as bone mass naturally decreases. Ensuring a consistent intake of calcium, along with vitamin D, is fundamental for maintaining optimal bone health throughout one's life.