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Phosphate Testing (P)

The Phosphate test is also known as a Phosphorous, PO4 test.

All you need to know about testing Phosphate levels with a laboratory test

  • What is the Phosphate test for?
  • What if Phosphate results are high?
  • What if Phosphate results are low?

Phosphate Testing UK Statistics 2026

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20.8% of people tested have Phosphate levels which are too high.

And 3.8% have levels that are too low.

1.3

Low
< 0.87

Normal
0.87 - 1.45

High
1.45 +

The average Phosphate result is 1.3 mmol/L
Note what is normal for you may differ for your age and sex.

Are you in the 75.5% with normal results?

What Is The Phosphate Test For?

Phosphorous is a mineral that is required to build strong teeth and bones.

It is also needed for a nerve signalling (when the brain sends signals through our nerves) and muscle contraction.

Abnormal levels of phosphorous can occur in the presence of bone, liver and kidney diseases.

Conditions linked to Phosphate

Chronic kidney disease

Chronic kidney disease

Chronic kidney disease is a gradual loss of kidney function that affects around 1 in 10 people in the UK, often without symptoms in its early stages.

How To Test Phosphate

By buying a laboratory test kit with professional nurse or clinic collection, you can accurately measure Phosphate for total reassurance.

Professional analysis in an accredited laboratory ensures rapid result delivery.

Tests which include a Phosphate test:

What if Phosphate Results Are High?

Higher than normal phosphate levels can contribute to calcium deposits forming in organs, particularly the kidneys, so this result is often considered alongside calcium levels.

Raised phosphate can be associated with excessive supplementation. It can also be linked to other conditions, including advanced kidney disease or a disorder of the parathyroid gland.

High phosphate levels are commonly interpreted in the context of other results, including calcium (for example, from a bone profile), kidney function tests (for example, from urea and electrolytes), and parathyroid hormone levels. Symptoms are also relevant when considering the significance of a high phosphate level, and this finding is often reviewed further to clarify the cause.

What if Phosphate Results Are Low?

Dietary deficiency is an uncommon cause of low phosphorus, but it can occur in cases of malnutrition or alcoholism.

Low phosphate levels (hypophosphataemia) can also be associated with hypercalcaemia (high calcium levels), as well as a wide range of other conditions, including disorders of the parathyroid gland.

Some drugs can cause excessive phosphate loss in the urine.

This finding is often reviewed further to clarify the cause and any possible treatments. Because various drugs and diseases can be linked to low phosphate (including diuretic use, hyperparathyroidism, and genetic diseases), this result is commonly shared with a GP.

Who Should Take This Test?

Measure your Phosphate levels and with a nurse or clinic test kit

You get the convenient testing with the reassurance of professional clinical analysis. Your results are delivered quickly & securely online.

This Test is advised if you:

  • want the convenience of home testing without waiting for a GP appointment;
  • need a high quality, clinically accredited test done in a professional clinical laboratory.
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