Improve energy and beat fatigue

Feeling fatigued? Find out what could be affecting your energy levels with a home blood test and GP advice.

Track your progress with a subscription:

  • See your results change over time with trend charts
  • Make lifestyle changes and see how they improve your health
  • Change what you're testing, pause or cancel anytime


  • Free delivery
  • Test arrives in 2-4 working days

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What can a blood test tell you?

While changes in your energy levels are normal, long periods of tiredness might signal that something else is going on. Many factors can affect your energy levels — from hormone levels to a nutrient deficiency. 

Get the insights you deserve to improve your energy levels with GP-reviewed results and evidence-based advice.

What's covered in this blood test?

Vitamin D

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Vitamin D is thought to help support your mitochondria — the "powerhouses" in your cells that produce energy for your body to use. If you're deficient in vitamin D, you might feel exhausted and have a low mood.

Advanced iron profile

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Your body uses iron to make haemoglobin — a part of red blood cells that carries oxygen around your body. If you don't get enough iron you might develop iron deficiency anaemia. Tiredness, shortness of breath, and heart palpitations are signs you might be deficient.

Vitamin B9 and B12 (active)

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Vitamin B12 and vitamin B9 (folate) are essential for good energy levels. This is because low levels can cause anaemia — where you can't properly transport oxygen around your body. This can cause extreme tiredness.

HbA1c (diabetes risk)

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An HbA1c blood test measures your average blood glucose levels over the last 3 months. Normal to optimal HbA1c levels are linked to better energy levels.


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Testosterone plays a role in red blood cell production — which is important for energy. Low testosterone levels are linked to anaemia, which can lead to tiredness and fatigue. 

Collection method

Your test kit contains everything you need to collect your sample at home. Our instructions will guide you through it.

Your journey to better energy

Thriva kit

Do your test

Your kit arrives in 1-2 days. Find out how to collect your sample at home. You’ll need to fill 2 tubes for this test — around 10 drops of blood.

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Fast, accurate results

Free post your sample to our lab and get your results in as little as 48 hours. Access your GP-reviewed report in your results dashboard.

Blood test results trend on laptop

Support your energy levels

Our doctors give you evidence-based tips to help you support your health. And you can access articles, podcasts, and recipes.

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Data protection

Your data is in safe hands. We use the latest encryption technologies and take our Data Protection obligations seriously.


What's included in your home testing kit?

Your Thriva test kit includes:

- collection tube(s)

- plaster x 2

- return form x 1

- alcohol swab x 1

- lancet x 3

- prepaid envelope x 1

- cleansing wipe x 1

- collection tube label(s)

- protective plastic case x 1


How to collect your sample at home

Learn how to collect your finger-prick blood sample at home by following our instructions. You can access these on the app too. It takes around 30 minutes to complete the process at home.


Will a GP write your report?

Our doctors review your blood test results and upload a detailed report to your account dashboard. They also give you advice to help support your health or manage an existing condition.


How long does it take to get your results?

Our doctors aim to upload your results report to your account dashboard within 48 hours from the lab receiving your sample. Tests containing Omega-3 & 6 have a 10-day turnaround time after posting your sample.


How do you know when your results are ready?

We’ll email or text you to let you know your blood samples have been received, processed, and are ready to view on your results dashboard.