Phosphorus Serum Test

What is the purpose of this test?

Order this Phosphorus Serum Test to measure the blood's phosphorus (phosphate) levels and help screen for an imbalance. Phosphorus is a mineral essential to several of the body's physiologic functions, such as bone growth, energy storage, and nerve and muscle production. The body obtains the required phosphorus by absorbing it from our food. Therefore, foods like beans, peas and nuts, cereals, dairy products, eggs, beef, chicken, and fish contain substantial phosphorus. In addition, most phosphorus in the body combines with calcium to form bones and teeth. Phosphorus also plays a crucial role in maintaining the body's acid-base balance. 

This phosphorus serum test is most useful for monitoring individuals with the following conditions:

• Dehydration
• Renal disease
• Liver disease
• Diabetic ketoacidosis
• Pregnant

What conditions cause abnormal phosphorus levels?

The body regulates phosphorus (phosphate) levels in the blood by controlling how much it absorbs from the intestines and how much it expels through the kidneys. Unfortunately, an individual may have a phosphorus deficiency if they are malnourished or has an underlying health issue that causes malabsorption, acid-base imbalances, increased blood calcium, or a disorder with kidney function. 

However, if phosphorus levels in the blood are too high, there may be deposits of phosphorus (combined with calcium) in the muscles. This condition is rare and only occurs in people with severe calcium absorption or kidney problems. More commonly, excess phosphorus leads to cardiovascular disease (CVD) or osteoporosis (weakening of the bones).

When should I order a Phosphorus Serum Test?

Individuals may order this test if they have experienced symptoms related to a phosphorus imbalance. Common signs or symptoms that may indicate a phosphorus imbalance include:

• Changes in mental state (anxiety, irritability, or confusion)
• Bone issues (pain, fragility, and poor development)
• Irregular breathing
• Fatigue
• Loss of appetite
• Muscle weakness
• Weight gain or loss