Corn Intolerance

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    FirstStep Test

    The FirstStep Test is a simple and convenient home to laboratory test. The test will give you a clear 'positive or negative' indicator of food intolerance*. If you have a positive result you may then choose to purchase one of our full programmes to investigate your individual problem foods under our expert guidance. 

    Key benefits

    • Simple ‘positive or negative’ indicator of food intolerance*
    • Convenient home to laboratory testing service with FREE delivery and return
    • If positive, the price is deducted from the cost of your Complete YorkTest Programme



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  • Problems Associated with Foods

    Could you be suffering from food intolerance? Find out about the common symptoms.

    Symptoms of intolerance
  • 30 Years of Experience

    YorkTest Laboratories have over 30 years' experience of laboratory diagnostic testing and are Europe’s leading provider of food and drink specific IgG antibody testing programmes.

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