Certified Dietary Manager (CDM) Practice Exam

Calcium is essential for maintaining healthy bones because it plays a critical role in bone structure and strength. Approximately 99% of the body’s calcium is stored in the bones and teeth, where it contributes to their density and overall integrity. Adequate calcium intake throughout life, particularly during periods of growth and development, is vital for achieving peak bone mass and minimizing the risk of osteoporosis later in life.

Calcium not only helps in the formation of bone tissue but also assists in regulating the function of other bodily systems. When calcium levels are low, the body may draw from bone reserves, leading to weakened bones over time. This highlights the importance of adequate dietary intake of calcium through foods such as dairy products, leafy greens, and fortified foods, or through supplements if necessary.

While other minerals like magnesium and zinc also contribute to bone health, they do so in supportive roles rather than as the primary structural component that calcium provides. Iron, while important for blood health and oxygen transport, does not play a direct role in bone strength. Therefore, calcium's fundamental role in establishing and maintaining bone structure firmly establishes its importance in bone health.