There is no fastest way to reduce phosphorus, patients with elevated blood phosphorus is considered to be hypoparathyroidism, renal failure and other diseases, need to take appropriate treatment for the cause. 1. Hypoparathyroidism: elevated blood phosphorus may be caused by hypoparathyroidism. Patients can take calcium carbonate, calcium chloride, calcium citrate and other calcium supplements or vitamin D, such as calcitriol, under the guidance of the doctor. 2. Renal failure: elevated blood phosphorus may also be caused by renal failure. Patients can take oral calcium carbonate, aluminum hydroxide, etc., or hemodialysis or peritoneal dialysis, etc., which can play a role in reducing blood phosphorus. There are many reasons that lead to elevated blood phosphorus in the patient’s body, it is recommended that the patient go to a regular hospital, identify the cause of the disease, and under the guidance of the doctor for treatment.