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Energy check

"Why am I so tired?"

This is a question we often ask ourselves as feeling fatigued or generally lacking in energy is a particularly common complaint. There are a host of reasons why you could be feeling lethargic, including anaemia, thyroid problems or low vitamin D levels.

Our energy check is designed to give you insight into some areas of your health that could be affecting your energy levels and includes tests for

  • TSH (indicating whether there is an issue with the thyroid function)
  • Vitamin D (a deficiency can lead to fatigue and weakness)
  • Ferritin (the best marker for iron deficiency)

The check includes a home finger prick blood test kit, the sample for which you can collect quickly and conveniently at home. Your results will be reviewed by a registered healthcare professional and made available through your personal online health dashboard.  Here you can track changes and gain information on each marker including what you need to do to improve. 

Finger prick
Estimated turnaround: 2 days
From receipt of sample
Track & save!
By tracking for 12 months, you can save up to 20% off your tests
By tracking for 12 months, you are saving 0% off your tests
By tracking for 12 months, you are saving 0% off your tests
By tracking for 12 months, you are saving 20% off your tests
By tracking for 12 months, you are saving 15% off your tests
Why Track?

Why check your energy markers?

  • You’ve been suffering from low energy, feeling weak and would like to get to the bottom of the cause
  • You’re already aware of a problem causing low energy levels and want to track the progress of key biomarkers over time to see how they have responded to relevant treatment or dietary changes
  • If you’re wondering “Am I anaemic?” or concerned about potential iron deficiency, this test will give you answers

Benefits of energy testing

When it comes to energy, many of us track things like how much we sleep and what we eat. But by taking an energy blood test you can get to the bottom of anything internally that might be contributing to low energy.

If you find you have high or low levels of TSH, Vitamin D or ferritin, you can then take the steps towards rectifying it and improving your energy levels.

Equally, our tests are beneficial to those already aware of an existing condition affecting their energy levels in order to track progress over time.

The energy blood test kit is a simple one taken at home. You then simply post your sample back to our lab and you’ll have your results in a couple of days. Our online dashboard will clearly show your results in a way that is simple to understand and also tracks changes over time.

Biomarkers included in this package


Tested biomarkers
  • Thyroid Stimulating Hormone (TSH)

Vitamins & minerals

Tested biomarkers
  • Vitamin D (25 OH)
  • Ferritin

How it works

Collect sample

We will send you a finger prick kit to use at home

Post sample

Pop your sample in the post to us using a pre-paid envelope

Online results

View your results on your secure personal health dashboard

What our customers say

I'd put off getting regular blood tests before because of the long-winded process of a GP visit. Forth has changed all that. The process is very quick and very easy, with thorough, well-explained results delivered to your inbox within days.

Alice Hector

Taking the test is simple just make sure you follow all the instructions so you follow the correct procedures. The customer service is second to none and the results are easy to understand and follow.

Matthew Bottrill

As a working mum, I often find myself training ‘tired’ as the demands of day-to-day life take their toll.  Forth has enabled me to gain a valuable insight into what is happening ‘under the surface’, so I  can adapt my training and lifestyle.

Kate Allan

As a former Olympic cyclist I always wanted to look after my health. This has never changed to this day but become a lot easier via Forth, it’s the only way to really understand your own body. 

Brian Smith

I ran my first marathon in 2014 which left me feeling exhausted and constantly unwell. What I didn’t know then was that my iron and vitamin D levels were incredibly low.  By using Forth to test key biomarkers has put me in control of the areas I need to improve.

Jude Peck, 42

I suffer from a hereditary condition which causes my body to store too much iron.  My biggest issue before using Forth was getting an appointment with my GP.  Now using Forth I can track my iron quickly and easily and take action before levels start to affect my health

Mark Threfall, 29

I was keen to use Forth’s service to help monitor my haematological markers in particular since I've had problems in the past and by the time they are picked up by the GP I'm normally feeling unwell.  The test was quick and easy to do and results were back very quickly. The results are also incredibly accurate, being almost identical to those from tests done by my GP the same day.

Alice Lethbridge

Forth really helped me understand issues that I was having, which in the end turned out to be problems with iron absorption. Without their test I would never have known this. I now have the knowledge I need to improve.

Sean Conway

I enlisted the help of Forth to help me get to the bottom of my current health concerns. The test was really easy to and my results were available within day. Using Forth has helped me take the action needed to get my hormones back on track.

Holly Rush, 39

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