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your 10% discount will be applied at checkout


Unlock your unique biological profile to be your best

Track your biomarkers over time to develop a clear picture of your health and how your body responds to changes in activity, nutrition and more

The more information you have, the more you’ll understand your body

One test will give you a snapshot of your body as it is, but testing repeatedly over time gives you some serious advantages.

Firstly, it allows you to develop a clear picture of your own unique biological profile and determine what ‘normal’ is for you. After all, everyone is unique and no two bodies are the same.

Secondly, it allows you to accurately measure what lifestyle changes have the greatest impact on your health, and target those specifically.

Third, you’ll be able to identify areas that need improvement and with the advice from our experts, make the right changes.

Fourth and finally, it will give you early notice of any negative changes to your health so you can act quickly and get the advice and help you need.

How often
should I track?

We recommend testing every four to six months to build up the most accurate picture of your own biological profile. By testing regularly, you’ll be able to see how your body responds to changes like alterations in diet, nutrition and exercise, hormone levels, stress and illness.

Our Forth subscription packages are a simple way to do this; you choose how often you want to receive a kit and we’ll send one out automatically at the chosen interval. All you need to do is complete the sampling, set it back and check the app for your updated biomarker results.

What are the advantages of regular testing?

Every person is unique, so while there are recommended ranges for certain biomarkers, there can be a lot of individual variation within this.

If you want to know whether a biomarker result or variation is significant for you, you can get a much better idea of this if you know what your own individual ‘normal’ levels are, and the best way to do this is to get plenty of data through regular testing. The more datapoints you have, the better our experts will be able to identify the Critical Difference Threshold or CDT for you, and therefore decide whether a significant physiological change has happened.

The more regularly you test, the clearer the picture of your performance and health, and the more accurately we can help you identify issues before they become problems.

Service Status

Kit Dispatch

Kits ordered before 1pm from Monday to Friday continue to be dispatched same day via First Class Royal Mail. After 1pm your kit will be dispatched the next working day. Orders placed on the weekend will be despatched Monday.

Postal Service

There may be some delays in parts of the UK occurring, we recommend posting into a priority post box. Click here for updates on the Royal Mail service. Click here for updates on the Royal Mail service.

Lab Analysis

Our labs are operating as normal.

Doctor/nurse reviews

Our doctors and nurses are currently working remotely and continue to review results.

Home phlebotomy appointments

Our home phlebotomy service is running but please be aware, if you or anyone in your household have experienced symptoms of COVID-19 within the last 14 days, due to the current government guidelines, we are unable to arrange an appointment at this time. Due to a high demand for nurses, along with current covid restrictions around the UK, there may be a delay in providing an appointment.

Customer service

Our customer service team are currently working from home, available to answer any questions via email.

Results dashboard

You can continue to access your results as normal either through your browser or via our iOS or Android app.


If you are an employer and would like to order multiple tests for your employees, please complete the form below.