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Calcium et santé osseuse

Bone Collagen

The main fibrous protein that gives bones their flexibility and shock-absorbing capacity.

Definition

The primary organic protein in bone that forms a triple-helix structure, providing tensile strength and flexibility. Collagen makes up approximately 90% of the organic bone matrix.

How it works

Collagen is the most abundant protein in the human body and serves as the primary structural component of bones. It forms long, strong fibers that act like the rebar in reinforced concrete, allowing bones to bend slightly without breaking. The collagen matrix serves as a scaffold upon which mineral crystals (primarily calcium phosphate) are deposited, creating a composite material with both strength and flexibility. As we age, collagen synthesis decreases, and existing collagen can become cross-linked and brittle, increasing fracture risk. Vitamin C is essential for collagen synthesis, making it an important nutrient alongside calcium for bone health.

Role

Forms the flexible fibrous matrix of bone that provides tensile strength, resilience, and shock absorption while serving as the scaffold for mineral deposition.

Examples

  • Type I collagen
  • Bone matrix fibers
  • Osteoid
  • Gelatin from bone broth

Recommendations

Consume vitamin C-rich foods (citrus, berries, peppers) daily to support collagen synthesis, and consider bone broth or collagen supplements if dietary intake is insufficient. Adequate protein intake is essential since collagen is a protein itself.

Key takeaway

Collagen is the flexible framework that prevents bones from becoming brittle and breaking under stress.

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