Blood test results explained: numbers, ranges and context
Make sense of the report’s labels and prepare useful questions for the professional who arranged your test.
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Liver and kidney blood tests: what they can and cannot show
Understand the purpose of these groups of tests and why a blood panel, urine test and clinical assessment have different roles.
By SHIFT Some Timber · Sources checked . General information, not an individual assessment. This guide has not been reviewed by a clinician.
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The short answer
Liver blood tests measure several substances that need to be considered together and in context. Kidney assessment often combines blood-based measures, such as creatinine and estimated filtration, with urine testing. A normal-looking panel is not a general certificate of health, and a flagged value needs an appropriate clinical explanation.
NHS Specialist Pharmacy Service: liver blood tests · NHS: chronic kidney disease diagnosis
A group of liver markers
A liver panel may include measurements such as ALT, ALP and bilirubin. Despite the familiar label “liver function tests”, these do not all measure the same aspect of liver health. NHS Specialist Pharmacy Service emphasises that no single blood test gives a complete assessment; symptoms, history and the pattern of results matter.
Kidney blood measurements
Creatinine is used to estimate how well the kidneys filter blood, commonly reported as eGFR. An estimate needs clinical interpretation rather than a comparison with a stranger’s number online. Kidney assessment may also involve testing urine for albumin. A urine indicator and a blood-based estimate answer different questions and do not substitute for each other.
Keep the reason for testing visible
You may be having a test to investigate symptoms, monitor a known condition or check something during treatment. Tell the reviewer which applies. Keep the complete report, not just the highlighted lines, and bring previous results if available. Ask whether the pattern or change over time matters more than one isolated measurement.
Do not turn a flag into a cleanse
A result cannot tell you to buy a detox product, stop a medicine or start a restrictive diet. Bring your medicine and supplement list to the clinician who reviews it, including non-prescription products. If a provider sells both testing and supplements, you can ask for a clear clinical explanation before considering any purchase.
Leave with a plan you understand
Ask which findings need attention, whether any repeat or different assessment is needed and who will arrange it. Ask how to seek help if symptoms develop while waiting. Persistent or worsening symptoms deserve medical advice even when a previous panel was within range. Ask Timber can explain general terminology; personal results and treatment decisions require your healthcare professional.
Sources and scope
Source checking is separate from clinical review. Linked guidance may change. Product instructions and service availability must be checked on the current product or provider page.
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