Three steps to optimal performance


  • Select the package which is right for you.
  • We’ll send you a finger-prick sample kit which will arrive within 2 working days through your letterbox.
  • Collect your blood sample at home and simply post it direct to our lab in the pre-paid envelope.
  • As your order is part of a subscription package, a new kit will be sent to you at the frequency you requested.  You can change the date, pause or cancel your subscription online at any time.


  • Your results will be available within days of receiving your sample on your secure online Forth dashboard.
  • We’ll give you easy-to-understand information on each biomarker and show you exactly where you fall on the range.
  • Once you’ve established your baseline numbers, by testing regularly you can track how your markers change according to training load and diet. 


Image of test results on an iPad
  • Make changes to your training load and diet to optimise your markers.
  • We’ll give you some tips on the type of foodstuffs which can improve some markers
  • Share your results with sports nutritionists or performance coaches

Note: The tests Forth offers are intended to improve wellbeing and optimise sports performance. The test results are for information purposes only. Forth does not interpret your results, offer clinical advice or diagnosis. If you do have concerns about your health, please discuss these directly with your GP.



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

Carrying a lot of fatigue around, it got to the point where I needed answers. I'd put off getting regular blood tests before as the long-winded process of a GP visit followed by a referral, hospital queues and then an extended wait, meant by the time you received your results, they were yesterday's news. 

Forth Edge has changed all that. The process is very quick and very easy, with thorough, well-explained results delivered to your inbox within 24 hours. The Endurance Test gave me definitive answers as to what was going on inside. It's the perfect monitoring tool that takes away a lot of guesswork.

Alice Hector, Pro long distance triathlete and 70.3 champion


Over the past 4 years I’ve suffered with a number of serious knee injures from ski racing at an International level. My rehabilitation and training can be very demanding - up to 16 hours a week in the gym lifting weights or on the bike. When I’m skiing, I can easily rack up 30 hours per week. Therefore, it’s important I can regularly monitor key biomarkers for immune function and fatigue including vitamin D, iron, and thyroid function. This allows me to make informed decisions about my training, recovery and nutrition, so I can stay healthy and perform at my best.

Jazmine Butcher, British Alpine Ski Racer


Add to basket