Аннотация:Phosphorus is an essential macronutrient, various functions at the cellular level, it has signals in metabolic pathways and is involved in the production of cellular energy. In grade 3 to 5 kidney disease, the patient suffers alterations in the homeostasis of calcium, phosphorus secondary to dysregulation of FGF 23 (Fibroblast growth factor) and PTH (paratohormone), increasing the risk of vascular calcification, in kidney transplantation, even the levels of FGF 23 and PTH can remain elevated for several months.