Role of Vitamins in Maintaining Bone Health

Vitamins— A, C, D, K, and  B₁₂ are crucial for maintaining bone strength and health in the human body.

Vitamin A plays a significant role in stimulating osteoblasts activity and differentiation. While in children, it promotes bone growth; in adults, it influences the maintenance of bone health.

Vitamin C acts as a cofactor for the enzymes responsible for the hydroxylation of specific residues on the collagen that increase their stability.

Vitamin D helps in the uptake of dietary calcium and phosphate from the gastrointestinal tract. These minerals are essential for the formation of bone matrix.

Osteocalcin— a protein secreted by osteoblasts requires Vitamin K for its carboxylation and enzymatic activation. 

This carboxylated osteocalcin has a high calcium-binding affinity and aids in bone mineralization.

As a result, vitamin K deficiency can lead to a rise in the level of uncarboxylated osteocalcin, reducing bone mineral density and increasing the risk of fractures.

Similarly, vitamin B₁₂ deficiency can also lead to low bone mineral density and even contribute to osteoporosis, especially in women.