Private tests and supplements are marketed with growing confidence. Some are useful for some people. Many are not needed. These questions can help you decide, and they apply to anything we offer in future too.
A test is useful when its result could lead to a different action. If nothing would change whatever the result, the test may add cost and worry without benefit.
Results need to be read in the context of your symptoms, history and other results, ideally by a clinician who can explain them and arrange follow-up.
Look for references to guidelines or published studies in people, not just laboratory or animal work. Be cautious of testimonials presented as evidence.
"Supports energy" or "optimises" are not measurable outcomes. Ask what improvement has been shown, in whom, and how large it was.
Supplements can interact with medicines and some are harmful in high doses. Tests can produce false alarms that lead to further tests. Check with a pharmacist or your GP if you take regular medication.
The NHS Health Check covers the main cardiovascular risk factors for eligible adults aged 40 to 74. For supplements, the one piece of general UK advice is to consider 10 micrograms of vitamin D a day in autumn and winter.
A "normal" result is not a problem to be solved. Reference ranges exist for good reasons. Be wary of any service that treats normal results as a reason to buy more testing or products without a clear clinical reason.
Want to talk through what this means for you?
