Better2Know Liver & kidney

Kidney Function Test

Checks key markers of kidney function, including urea, creatinine and electrolytes, from a blood sample taken at a clinic or during a home nurse visit.

Sample
Blood
Collection
Venous draw at clinic or nurse visit
Results in
1 day
Biomarkers
1
Tests for
  • Kidney Function

Test specifications

Provider
Better2Know
Sample type
blood
Collection method
venous draw at clinic or nurse visit
Turnaround time
1 day
Biomarkers tested
1
At-home test
No
Doctor reviewed
No
Gender focus
Both

What's tested

1 biomarker as listed by Better2Know.

  • Kidney Function

About this test

This test looks at how well your kidneys are managing waste removal and fluid balance, through markers including sodium, chloride and bicarbonate (electrolytes that help regulate fluid and pH balance), plus urea and creatinine, both waste products that build up if kidney function is reduced. Reported together under a single kidney function result, these markers give a general indication of kidney health.

We do not have a directly comparable kidney function test from another provider in our data for this exact combination, but against the wider set of similarly sized liver and kidney tests we track, £135 sits almost exactly at the median, making this a mid-market option rather than a standout on price in either direction.

It scores around the middle across most criteria: reasonable for clinical depth given the number of related markers bundled into the result, and squarely average for price given it matches the market median. It scores lower for results and follow-up, since the result is not reviewed by a doctor as standard, although Better2Know's own description states it will arrange a doctor consultation if any of the markers come back abnormal.

Who is it for?

This suits people who have symptoms that could relate to kidney function, such as fatigue, an irregular heartbeat, nausea or changes in bowel habit, and want a general check without a full diagnostic work-up. Because the price is close to the typical cost for tests of this kind, it is worth comparing turnaround and collection options against similar panels from other providers before choosing on price alone, since we do not have a directly matched competitor test in our data for this one.

How it works

You provide a venous blood sample at a Better2Know clinic, or a home nurse visit can be arranged instead. The sample is sent to the laboratory, and Better2Know states results are typically ready within one working day of arrival, viewable in your secure online patient area. Results are not reviewed by a doctor as standard, though Better2Know says it will arrange a private consultation if any markers are abnormal.

Pros & cons

Pros

  • Covers five related markers, sodium, chloride, bicarbonate, urea and creatinine, in one result.
  • Laboratory turnaround of one working day once your sample arrives.
  • A home nurse visit is offered as an alternative to attending a clinic.
  • Priced almost exactly at the roughly £135 median for similarly sized liver and kidney tests we track.

Cons

  • Results are not reviewed by a doctor as standard.
  • Requires an in-clinic or nurse-visit blood draw rather than a postal home kit.
  • We do not have a directly comparable test from another provider in our data to check this one against.

Our editorial score

Compare Health Test Score Kidney panel priced right at the market median
Editorial confidence: 9.0/10

This test reports on kidney function through markers including sodium, chloride, bicarbonate, urea and creatinine, giving an overview of how well your kidneys are filtering waste and maintaining fluid balance. At £135 it sits almost exactly at the roughly £135 median for similarly sized liver and kidney tests we track, making it neither notably cheap nor expensive for its size. Results are not reviewed by a doctor as standard.

Score breakdown

  • Clarity and documentation 9.0/10

    The listing publishes a detailed description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 6.1/10

    1 biomarkers, placing it in the 26th percentile of liver kidney tests we track.

  • Collection convenience 6.0/10

    Requires a venous draw at a clinic; a home nurse visit is offered; results in around 1 days, well ahead of the liver kidney norm of 2.

  • Results and follow-up 3.0/10

    Results are not doctor-reviewed and no consultation is included; the provider does not describe the report format.

  • Trust signals 6.5/10

    Trustpilot 4.2 from 775 reviews; CQC registered; trading 18+ years.

  • Value for money 6.5/10

    £135.00 against a median of £135.00 for the 17 similarly sized liver kidney tests we track (-0%).

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

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