Tolerance is the brand that's re-writing the standard protocols for addressing histamine intolerance.

  • Andrew Sears

    Founder

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    Andrew has always been passionate about health and wellness. He founded Tolerance following his own gut issues and experiencing first hand how difficult it can be to find accurate information, clinical and nutritional support and management solutions. He's here to build the trusted industry brand for food intolerances, starting with histamine.

    LinkedIn 
  • Nichola Williams

    Resident Histamine Expert

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    Nichola Williams is a registered dietitian with over 15 years of NHS experience, specialising in gastroenterology. She has worked extensively with patients experiencing complex functional gut disorders. Drawing on both clinical expertise and lived experience of histamine intolerance, Nichola now runs The Dietary Edit, supporting adults through evidence-based, practical strategies to manage reactions. She is the creator of The Unrestricted Method, a structured program designed to help people understand and manage histamine intolerance without overly restrictive diets.

    The Dietary Edit 
  • Rosie Hogg & Catherine Nash

    January - March 2025

    The co-founders of Oxford Gastro Dietitians. Cat has been working in the NHS as a Registered Dietitian for over 11 years. For the last nine of those, she has been specialising in gastroenterology. Rosie has been a Dietician for the NHS for seven years, and more recently has been specialising in allergies.

  • Chloe Hall

    November - December 2024

    A Dietitian with over 13 years experience working in the NHS. She now runs her own business @thecalmgutdietitian, specialising in gut health, histamine intolerance, MCAS, Long Covid and PoTS. She is on the dietetic advisory board for two charities: The IBS Network, the national charity for those with IBS, and Mast Cell Action, the national charity for those with MCAS. 

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