Experts On Food Intolerance For Over 35 Years

Take the First Step Today

Our FirstStep test is a simple home to laboratory test that gives you a positive or negative result on your food intolerance (defined as a raised level of food specific IgG antibodies):

  • Expert laboratory testing and analysis
  • Convenient home to laboratory testing service
  • Free delivery and return post to our laboratory
  • Personal one-to-one post-test support from our experienced customer care team
  • If you have a positive result take one of our full testing programmes to find out what ingredients you are reacting to
  • The FirstStep Test is not available outside the UK and Ireland

£24.99

†YorkTest define Food Intolerance as a food-specific IgG reaction
*BANT stands for the British Association for Nutrition and Lifestyle Medicine – a professional body for registered nutrition practitioners

Our food intolerance testing programmes

Food&Drink Scan

IBS Diet Programme

Ideal Weight Programme



Our five simple steps



What our customers say

Are you suffering from any of these symptoms?

Digestive Problems?

Headache Problems?


Symptoms of Food Intolerance


Example Problem Foods


Popular Blog Articles

What are the symptoms of Beef Intolerance?
Could You Have a Banana Allergy or Intolerance?
Do You Have A Tomato Allergy or Intolerance?
Caffeine Intolerance Signs & Symptoms

As seen on TV!

  • Free delivery
  • Money back guarantee with food intolerance testing†
  • After care customer service
  • Producers of industry leading research and studies on food intolerance†
  • Personal one-to-one post-test support from BANT* registered nutritional therapists