What is the normal value of phosphorus in mmol/l

The normal value of serum phosphorus in adults is 0.81-1.45mmol/L, while in children it is slightly higher at 1.29-2.26mmol/L. Phosphorus is an important element for bone formation and energy metabolism, and its levels are influenced by diet, kidney function, and hormone regulation.

Serum phosphorus testing is usually completed through intravenous blood collection and requires fasting for 8-12 hours. A test result below 0.81mmol/L may indicate hypophosphatemia, which is commonly seen in long-term malnutrition, vitamin D deficiency, or excessive use of antacids. Patients may experience symptoms such as muscle weakness and bone pain. Higher than 1.45 mmol/L may indicate hyperphosphatemia, which is often associated with renal dysfunction and hypoparathyroidism, and may be accompanied by skin itching or vascular calcification. Some medications such as phosphorus containing laxatives and intravenous nutrient solutions can also interfere with the results. Three days before testing, avoid high phosphorus diets such as dairy products and nuts, and wait for 24 hours after vigorous exercise before testing. Hemolytic specimens can cause false elevation, and standardized procedures should be followed during blood collection.

It is necessary to maintain a balanced diet of phosphorus and calcium in daily life. The recommended daily intake of phosphorus for adults is 700mg. People with abnormal kidney function should limit the use of phosphate additives in processed foods and regularly monitor blood phosphorus and parathyroid hormone. If the detection value is abnormal, a comprehensive judgment should be made based on indicators such as blood calcium and urinary phosphorus, and if necessary, bone metabolism related examinations should be performed.