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Phosphate (Pi) plays important roles in growth, development, bone mineralization, energy metabolism, nucleic acid synthesis, cell signaling, and acid-base regulation. The rate of intestinal absorption of Pi is a major determinant of Pi homeostasis. The type lib sodium- dependent Pi cotransporter (NaPi-Iib) is responsible for intestinal Pi absorption. Many physiological factors regulate the rate of Pi absorption via modulating the expression of NaPi-Iib in the intestine. In this review, we summarize the role of these factors in the regulation of NaPi-Iib expression in the intestine.