What is the relationship between calcium and phosphorus?

Calcium and phosphorus are closely related as they work together to build and maintain strong bones and teeth. The balance between these two minerals is regulated by hormones like parathyroid hormone (PTH) and vitamin D. Imbalances in phosphorus levels can disrupt calcium levels, leading to conditions like hypocalcemia or hypercalcemia. Calcium testing often complements phosphorus testing to provide a complete picture of bone and mineral health.