Parathyroid hormone (PTH) is a crucial regulator of calcium and phosphate homeostasis in the body. It is produced by the parathyroid glands and plays a significant role in maintaining optimal levels of these minerals in the blood. PTH functions by increasing calcium reabsorption in the kidneys, promoting the release of calcium from bones, and stimulating the production of active vitamin D in the kidneys, which in turn enhances intestinal absorption of calcium.
