Vitamin D3 and vitamin K2 work together to support bone metabolism. Vitamin D3 increases calcium absorption from the digestive tract, while vitamin K2 activates osteocalcin, a protein responsible for binding calcium to bone tissue. This coordinated process helps maintain bone mineral density and skeletal strength. As people age, maintaining adequate levels of these nutrients becomes increasingly important for bone health. Balanced nutrition, adequate sunlight exposure, and appropriate supplementation when necessary are key strategies for supporting strong bones.