• Optimal Performance

    To get the best out of your body you need to look beyond the surface and understand what’s happening on the inside.

    Choose a test
  • Know Your Numbers

    Forth analyses over 30 key biomarkers essential for performance. Make sure you know your numbers.

    Choose a test
  • Matt Sharp, ITU U23 World Champion

    “Measuring blood profiles is the best way athletes can get the most out of their training.”

    Choose a test

In pursuit of your performance potential? Looking for the edge?

You’ve just found it.

Understand your body like never before. Our blood tests are designed for athletes who want to track key biomarkers integral to performance.

Whether you’re a recreational athlete, weekend warrior or professional competitor, our simple lab analysed blood tests and tracking platform will give you greater insight into your athletic performance. Find out exactly what state your body is in and unlock your weaknesses from the inside out.

Understanding what’s happening on the inside is the first step towards pushing yourself to new limits whilst still protecting your health.

How it works

  • Test

    Select the subscription package which is right for your sport. We will then send you your first kit to collect a finger-prick blood sample easily at home. Once done, simply post the sample direct to our lab.

  • Track

    Results will be available within days on your online dashboard. Here you can track key markers for fatigue, recovery and more, allowing you to make adjustments to your training load and ensuring your body remains in good health.

  • Optimise

    Forth gives you the power to optimise your biomarker profile. The affect each biomarker has on your performance is explained together with information on foods to help you reach peak performance.

We recommend re-testing at least every 3 months to establish baselines and build your unique biomarker profile.

Forth uses the latest advances in clinical testing and digital technology to enable athletes and fitness enthusiasts to gain deep insights into their unique biomarker profile.

How it works


Tests backed by science, created for optimal performance

  • Endurance

    For endurance sport athletes such as triathletes, cyclists and long distance runners.

    £99 per test


    View Details
  • Power

    Perfect for athletes and body builders involved in strength and resistance training.

    £89 per test


    View Details
  • HIT

    For sports which require continued or bursts of high intensity such as track cycling or team sports.

    £99 per test


    View Details
  • Race Fit

    For those in the early stages of their fitness journey or under taking a new challenge.

    £79 per test


    View Details
  • Training Load

    Find out if you are in danger of over-training and need to give your body a little more rest.



    View Details
  • Recovery

    Scientifically measure how long it takes your body to recover after a race or heavy training week.


    Pack of 3

    View Details


See how a simple test can improve your performance...

As a working mum, I often find myself training ‘tired’ as the demands of day-to-life take their toll. Forth Edge has enabled me to gain a valuable insight into what is happening 'under the surface’, so it is possible for me to adapt my training and lifestyle to get the very most out of each and every race.

Kate Allan, Time TrIal Cyclist & Finley’s Mum


As a professional triathlete I put my body through a lot of stress. Some weeks involve over 30 hours of training and at the end of a block of training I expect a lot from myself. I respond to visible markers of fatigue and blunted immune function by adapting my training, however by working with Forth I’ve been able to get a better insight into my health, my fitness and my fatigue levels. This allows my to more accurately adapt my training load and get more out of the work I’m putting in. Ultimately it allows me to load my training at the right times and therefore race at my best.

Susie Cheetham, Professional triathlete

All the knowledge you need to gain your edge

Content & Resources

Latest blog

Food Hack #Mackerel


Download biomarker guide

To help you gain a greater understanding of the role key biomarkers play on your health and performance, we’ve put together an easy-to-understand guide.



Want to know what your dashboard and results will look like. Then take a look at our demo account?

View our demo

Add to basket