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Sodium Testing (Na)

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

  • What is the Sodium test for?
  • How to test Sodium?
  • What if Sodium results are high?
  • What if Sodium results are low?
  • Who should take the Kidney Function Venous Blood test?

What Is The Sodium Test For?

Sodium is essential to normal bodily function, playing a critical role in the maintenance of normal blood pressure. Sodium also helps regulate your body's fluid balance and aids in nerve and muscle communication.

Sodium levels in the blood, as well as all body water, are regulated by the kidneys ideally within a very narrow concentration range.

Abnormal blood sodium is usually due to an issue with hormone production or thirst and results in too little (dehydration) or too much (edema) body water content.

How To Test Sodium

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

Professional analysis in an accredited laboratory ensures rapid result delivery.

The Vitall Kidney Function nurse or clinic test kit includes a Sodium test and is available for just £199.00.

Tests which include a Sodium test:

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Take Control Of Your Health | Home Blood Testing Services

Kidney Function Test Kit

Kidney Function test kit
Kidney Function Home Test Kit UK

Kidney Function Test Kit

Assess normal kidney function and your electolytes

£199.00

View Full Details ›

What if Sodium Results Are High?

High blood sodium can have many causes. It is commonly linked with dehydration and with hormone-related disorders, including abnormal cortisol, aldosterone, and renin levels. Organ failure involving the kidneys, liver, or heart can also be associated with abnormally high sodium, as can certain drugs such as diuretics.

This finding is generally treated as clinically significant, with the level of concern often depending on how high the sodium is. Values below 150 are often reviewed for further evaluation, while values above 150 are commonly treated as more urgent and may be prioritised for rapid review and repeat testing.

What if Sodium Results Are Low?

Low sodium can share similar underlying causes with high sodium. It can be linked to dehydration, hormone-related disorders (including abnormal cortisol, aldosterone, and renin levels), and organ failure affecting the kidneys, liver, or heart. Certain medicines, such as diuretics, are also associated with low sodium levels.

Sodium is important for several normal body functions, so levels outside the usual range are generally treated as clinically significant. Levels below 125 are associated with a high risk of brain dysfunction, and results in this range are often prioritised for urgent review. Levels above 125 but still low are commonly treated as requiring medical attention and may be looked at alongside repeat testing and other related results.

Who Should Take This Test?

Measure your Sodium levels and assess normal kidney function and your electolytes with a Kidney Function nurse or clinic centrifuged venous bloodtest kit

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

This Kidney Function 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.

Other Biomarkers Often Tested With Sodium

Urine, swab or bood test. This test is available to buy online Chloride
Urine, swab or bood test. This test is available to buy online Creatinine
Urine, swab or bood test. This test is available to buy online Estimated Glomerular Filtration Rate
Urine, swab or bood test. This test is available to buy online Potassium
Urine, swab or bood test. This test is available to buy online Sodium
Urine, swab or bood test. This test is available to buy online Urea

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