Food Intolerance & Allergy Testing

Food Intolerance & Allergy Testing

At Sozo Klenz, we partner with YorkTest – a UK leader with 38+ years of scientific expertise-to offer convenient home-to-laboratory blood tests and practical support. These tests are designed to help you understand possible reactions to foods and environmental triggers so you can make informed choices for your health and wellbeing.

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How it works

  • Food Intolerance (IgG-mediated):

    Sometimes, partially digested food particles can enter the bloodstream. The immune system may recognise certain proteins as “foreign” and produce IgG antibodies. This response may contribute to inflammation, which in some people is associated with symptoms such as bloating, headaches and tiredness.


  • Food Allergy (IgE-mediated):

    A true allergy involves IgE antibodies and typically causes immediate reactions (often within minutes to 2 hours). Traces of the trigger can be enough to cause symptoms affecting the skin, airways and/or digestion.

These tests do not diagnose medical conditions. Results should be considered alongside your symptoms and professional advice.

Intolerance vs Allergy – key differences

Food Intolerance (IgG)

  • Reactions may be delayed (up to ~72 hours)

  • Several foods can be involved

  • Any body system may be affected

  • Common and hard to self-pinpoint

  • Symptoms may improve with guided avoidance (often 3–6 months)

Food Allergy (IgE)

  • Reactions are usually immediate (≤ 2 hours)

  • Fewer foods typically involved (often 1–2)

  • Often affects skin, airways, digestion

  • Trace amounts can trigger symptoms

  • Usually lifelong; requires medical oversight

Premium Food Intolerance Test (IgG)

£130 (intro offer, usually £180)

The most comprehensive YorkTest food & drink intolerance test—covering 200+ ingredients.

What you get:

  • Simple finger-prick blood sample kit delivered to your home

  • Fully accredited lab analysis measuring all four IgG subtypes

  • Results within ~5 working days of lab receipt

  • Easy traffic-light report (High / Borderline / Normal reactivity)

  • 1:1 results call with Daniela to discuss next steps (unlimited support available)

  • Food & drink diary guidance to track progress

  • Home convenience: post your sample; receive results and resources by email

Who it may help:

Anyone suspecting delayed food reactions and looking for structured guidance to identify potential triggers and optimise diet and wellbeing.

£130 (intro offer, usually £180)

A lab analysis for IgE-mediated allergies to 23 foods and 19 environmental allergens.

What you get:

  • Home finger-prick blood sample kit

  • Accurate, scientific lab analysis for selected IgE reactions

  • Clear results within ~5 working days of lab receipt

  • Guidance on next steps and support

  • Home convenience: post your sample; receive results and resources by email

Who it may help:

Those who experience immediate-type reactions and want evidence-based insights to discuss with their GP or allergy specialist.

Signs You May Have a Food Intolerance

Food intolerances can affect people differently, but common signs include:

  • Frequent headaches or migraines

  • Bloating, wind, or stomach discomfort

  • Tiredness or low energy

  • Anxiety, low mood, or brain fog

  • Changes in bowel habits (e.g. diarrhoea)

  • Skin issues such as eczema, rashes, or hives

These symptoms can have many causes. A food intolerance test may help highlight possible triggers, but results should always be considered alongside professional medical advice ⚠️

 5 Simple Steps

  1. Order your kit (delivered to your home)

  2. Collect a finger-prick sample (step-by-step guide included)

  3. Post to the lab in the prepaid envelope

  4. Receive results by email in ~5 working days from lab receipt

  5. Review with Daniela and plan your next steps (diet tweaks, elimination/reintroduction, aftercare)

Important notes & disclaimer

  • Tests do not diagnose medical conditions and are not a substitute for medical advice, diagnosis or treatment.

  • Always seek professional advice for severe, persistent, or acute symptoms (especially breathing difficulty, swelling of lips/tongue, or anaphylaxis).

  • If you have known allergies or medical conditions, consult your GP or specialist before making dietary changes.