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How can a shortage of protein and calories interfere with bone growth and repair?

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bone disease Defect of tibia, caused by septic osteomyelitis in childhood, with compensatory thickening of the fibula (right). Normal bones are shown at left.

A shortage of protein and calories significantly interferes with bone health because protein is an essential structural component of the bone matrix.1

During the process of bone mineralization, specialized cells called osteoblasts secrete osteoid, a gelatinous matrix composed primarily of collagen and other non-collagenous proteins. This matrix serves as the critical foundation where minerals like calcium and phosphate are deposited to form hardened bone tissue.2

When dietary intake of protein is insufficient, the body lacks the necessary building blocks to maintain or repair this organic matrix. Consequently, a deficiency in these structural materials can impair the integrity of the skeleton, hindering both the growth of new bone and the repair of existing bone tissue. Because bone health relies on a complex interplay of nutrition and cellular activity, inadequate protein and caloric intake can compromise the structural framework required for proper mineralization, potentially leading to increased susceptibility to fractures and other metabolic bone disorders.123