Food Sensitivity Test

IGG 1–4 AND IGA FOOD INTOLERANCE TESTING

Uncover the foods that could be contributing to your symptoms and inflammation.

Many people experience persistent digestive discomfort, skin flare-ups, fatigue, headaches, or unexplained inflammation, only to find that standard medical tests offer no clear answers. Often, these issues are driven by subtle immune reactions to specific foods that build up over time.

The Food Sensitivity Test from Steve Grant Health provides a detailed insight into how your immune system responds to different foods by measuring both IgG 1–4 and IgA antibodies. These immune markers help identify delayed food sensitivities that can contribute to inflammation, gut imbalance, and a range of chronic symptoms.

By identifying reactive foods, you can make informed dietary adjustments that support digestion, energy, and overall wellbeing.

What is the Food Sensitivity Test?

This advanced laboratory test analyses your body’s immune response to a broad range of foods, including dairy, grains, nuts, seafood, fruits, and vegetables. Unlike traditional allergy tests that measure immediate (IgE) reactions, this test focuses on delayed hypersensitivity reactions that may occur hours or even days after eating a particular food.

It measures two key immune pathways:

• IgG 1–4 antibodies – indicate delayed immune reactions that can trigger low-grade inflammation and chronic symptoms.
• IgA antibodies – reflect reactions at the mucosal level of the digestive tract, helping identify foods that may be irritating the gut lining.

Together, these results provide a more complete picture of how foods impact your body.

Who is this test for?

This test is suitable for individuals who experience:

• Digestive issues such as bloating, gas, or alternating bowel habits
• Fatigue or brain fog after meals
• Skin problems such as eczema, acne, or rosacea
• Joint pain or inflammation
• Headaches or migraines
• Autoimmune or inflammatory conditions

It is also suitable for those who have tried elimination diets without clear results and want a more scientific approach to identifying reactive foods and creating a personalised elimination diet.

Why test for Food Sensitivities?

Food sensitivities can contribute to inflammation, digestive distress, and systemic symptoms that are often overlooked or misdiagnosed. Identifying and addressing these sensitivities can support:

✔ Improved digestion and reduced bloating
✔ Clearer skin and reduced inflammation
✔ Better energy and concentration
✔ Enhanced immune and gut health

Testing provides clarity and direction, allowing you to personalise your nutrition based on objective data rather than guesswork.

What this test measures

The IgG 1–4 & IgA Food Sensitivity Test evaluates immune responses to a wide range of foods, typically including:

• Dairy products (milk, cheese, yoghurt)
• Gluten-containing grains (wheat, barley, rye)
• Non-gluten grains (oats, rice, corn)
• Eggs
• Fish and shellfish
• Meat and poultry
• Nuts and seeds
• Fruits and vegetables
• Legumes and pulses

Your report highlights foods that show elevated IgG or IgA activity, helping you understand which foods may be contributing to your symptoms.

What you receive

Your test package includes:

• A detailed laboratory report showing your individual IgG 1–4 and IgA responses
• Food category summaries and sensitivity rankings
• Option to add a 1-to-1 consultation for interpretation, elimination strategy design, and reintroduction guidance

How to order

You can order the Food Sensitivity Test directly through Steve Grant Health. Once ordered, a blood sample kit will be sent to your address with full collection instructions. We can help you find an appropriate phlebotomy service near you.

Turnaround time: Approx 10 working days
Sample type: Blood Test
Price: £525 (test only – excludes consultation or phlebotomy fees)

Downloads

For detailed instructions and a sample report, download:

• Test Instructions
• Sample Report

Take the next step

If you have been struggling with ongoing symptoms that have not resolved through standard testing or dietary changes, this test can help uncover the hidden food sensitivities that may be holding you back.

Order your Food Sensitivity Test today or free discovery call to discuss whether this assessment is right for you.