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. 2008 Oct 14;94(1):26–34. doi: 10.1210/jc.2008-1454

Figure 2.

Figure 2

Regulation of 1,25(OH)2D production in the kidney. PTH stimulates and FGF23 inhibits 1,25(OH)2D production in the kidney. In turn 1,25(OH)2D inhibits PTH production and secretion from the parathyroid glands and stimulates FGF23 production from bone.