Serum Phosphorus blood test is done to measure the levels of phosphate in the blood.
Most of the body's phosphorus is combined with calcium within the skeleton, but about 15% exists in the blood. Dietary phosphorus is efficiently absorbed, so low phosphorus caused by dietary deficiency is unlikely in the absence of a malabsorption syndrome (inadequate absorption of nutrients in the intestinal tract) for individuals on a normal diet.
Phosphorus blood test is used to evaluate several diseases. High levels may occur in Bone metastasis, Hypocalcemia, Hypoparathyroidism, Liver disease, Renal failure, Sarcoidosis, and increased dietary intake.
Lower-than-normal levels may indicate Diabetic ketoacidosis, Hypercalcemia, Hyperinsulinism, Hyperparathyroidism, or inadequate dietary intake of phosphorus or Vitamin D.
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