Renal physiology series: Part 5b of 8. Renal control of phosphorus and magnesium

The kidney plays a major role in the maintenance of phosphorus and magnesium balance. The homeostasis of these substances is complex and also involves the gastrointestinal tract and the bone. This article reviews the functions, homeostasis, and renal handling and regulation of phosphorus and magnesium. The major sites of tubular reabsorption and the presumed cellular mechanisms involved are described.