What can you learn?
What happens after the test?Get a full doctor’s report and product advice, all at no extra charge.
Get a downloadable report from a registered doctor explaining your results
Book a free video call with our expert advisors for product tips tailored to you
Meet our expertsGet to know our in-house clinicians
Dr Leah Gorodi
Medical Lead and GP with a special interest in lifestyle medicine and health prevention
Dr Taran Toor
Chief Medical Officer, clinical entrepreneur and GP with an interest in digital health
How it works
Register your test
Receive your test and register it on our app.
Do your test
Collect your blood sample at home.
Send it back
Pop your test in the nearest priority postbox.
Get your results
View your results on the app within 48 hours.
Your privacy, guaranteedJust like your doctor, we take your privacy extremely seriously.
Your data is secure. We use the latest encryption technologies and we’re committed to our data protection responsibilities.
Your data is never sold on, rented out, or shared with third parties for financial advantage.
We work with Care Quality Commission-accredited labs and our blood test kits are all CE-marked.
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There are many reasons why you might feel tired all the time. Some common culprits include low vitamin B12, low vitamin D, iron deficiency or problems with your thyroid function.
The main role of your thyroid is to control your metabolism (the body’s process of converting food and drink into energy). If you have an underactive thyroid gland, it can slow down your metabolism and impact your energy levels. The result can be that you feel like you need to nap a lot during the day or that you’re too exhausted to exercise.
Talk to your doctor before taking this test. Being pregnant can have a noticeable impact on your results, so make sure to check in with your GP first.
These blood tests are designed for adults aged 18 and over, and are unsuitable for children. Please note that these blood tests cannot treat or diagnose medical conditions. As Holland & Barrett don’t collect any data about your medical history, you must interpret the significance of your results with caution. Be aware that medical conditions, medications, or other aspects of your health can affect your test results. These tests do not replace seeking medical advice and assessment, and if you have an abnormal test result, you should always seek appropriate advice from a trained health professional.