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Food Intolerance

If you experience symptoms such as bloating, constipation, migraines, or eczema, it's possible that your diet includes foods that are not compatible with your body. The health value of a food item is relative, as individual physiological responses can vary significantly. Identifying food intolerances can be crucial in pinpointing the specific foods that trigger these adverse reactions. Undergoing an assessment to determine these intolerances may provide valuable insights, enabling you to make dietary adjustments that alleviate these symptoms.
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What are the symptoms of food intolerance?

Symptoms of food intolerance can vary widely among individuals but commonly include the following:

  • Gas, cramps, or bloating: These digestive issues are often the first signs that your body is struggling to process certain foods properly.
  • Heartburn: A burning sensation in the chest or throat can occur when food intolerances affect the digestive system’s ability to process certain substances, leading to acid reflux.
  • Diarrhoea: Frequent, loose stools may indicate that your body is rapidly trying to eliminate foods it cannot tolerate.
  • Headaches and Migraines: For some individuals, food intolerances can trigger headaches or more severe migraines due to inflammatory responses or specific food chemicals.
  • Constipation:Difficulty in bowel movements might be experienced by some as a reaction to certain foods.
  • Irritable Bowel Syndrome (IBS): Food intolerances can exacerbate symptoms of IBS, including abdominal pain, bloating, and changes in bowel habits.
  • Eczema: Skin conditions such as eczema can flare up as a result of food intolerances, indicating an immune response to certain foods.
  • Water retention: Experiencing swelling or puffiness in the body can be a sign of food intolerance, often due to the body’s inflammatory response to certain foods.

Eliminate Uncertainty From Your Diet

Distinguished from other available tests, our comprehensive analysis encompasses all four subtypes of food-specific IgG (1-4), unlike others that may only examine IgG4. This meticulous approach guarantees the detection of a broader range of food-specific IgG reactions, ensuring a more accurate identification of potential food intolerances.

Enhance Your Gut Health and Immune Function

Considering that 70% of your immune system resides within your gut, supporting gut health becomes essential for overall well-being. By minimising your “immune load” and eliminating potentially problematic ingredients from your diet, you can contribute to the optimal functioning of your gut, thereby bolstering your immune system’s efficacy. This strategy is integral to maintaining health and preventing immune overactivity, guided by our London-based nutritionists’ expert advice.

If you suspect you have a food intolerance, it may be beneficial to consult with a healthcare professional or a dietitian for an accurate diagnosis and tailored dietary advice.

How to get the test done:

  1. Order Your Test Online: Initiate the process by making a payment through our online platform
  2. Schedule Your Appointment or Opt for Home Delivery: Book a slot to visit our clinic in London, or provide us with your address to have the test kit delivered directly to you.
  3. Simple Sample Collection: The test requires only a finger prick to collect a small blood sample. Once collected, simply send it back to our lab for analysis.
  4. Receive Your Results via Email: Your detailed test results will be sent directly to your email, providing insights guided by our registered dietitians and nutritionists in London.

This streamlined process, supported by our comprehensive nutritional wellness programs in London, ensures you receive personalised health insights with ease. Whether you seek advice from a weight management nutritionist, or a sports nutrition expert, or need nutritional therapy in London, our services are designed to cater to your specific health and dietary needs.

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Food intolerance test

If you suffer from conditions and symptoms like IBS, bloating, constipation, migraines, or eczema, your diet may be the culprit. Some foods we eat can cause digestive issues, which we call food intolerance. If you are experiencing any of the symptoms listed above, one of our expert team members can help you identify the triggers and guide you with the right dietary advice.

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DNA test for diet and exercise

We all have different genetic makeup so we shouldn’t have generic advice for diet and exercise, right? So if you want to deeply understand your body and optimise your health and finish the guesswork game, the DNA diet and exercise test is for you. With a simple saliva sample, you will receive a very detailed report with important information about your diet and exercise ensuring you have an effective and personalised weight loss plan.

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Online Consultations

If you don’t live in London or you prefer the comfort of your home, you can opt for a virtual consultation with our expert nutritionists. We have more than 10 years of experience dealing with clients from anywhere in the world, our clientele comes from more than 80 different countries. That is not only important for our experience with different cultures, but also for our knowledge and understanding of products, brands and services available in different countries.

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Frequently asked questions

The difference between food allergies and food intolerances (or sensitivities) lies in the body’s response to certain foods, the symptoms triggered, and the potential severity of these reactions.

Food Allergy:

– Immune System Response: A food allergy involves an immune system reaction to a specific food protein that the body mistakenly identifies as harmful. Even small amounts of the allergen can trigger this immune response.

– Symptoms: Allergic reactions can be severe and sudden, ranging from skin reactions (such as hives or swelling), and gastrointestinal symptoms, to respiratory issues (like difficulty breathing or wheezing). The most severe reaction is anaphylaxis, a life-threatening condition that requires immediate medical attention.

– Onset: Symptoms of a food allergy typically appear within minutes to a few hours after consuming the allergen.

Food Intolerance:

– Digestive System Response: Food intolerance primarily involves the digestive system and occurs when the body has difficulty digesting a particular food, which might be due to enzyme deficiencies (e.g., lactose intolerance), sensitivity to food additives, or reactions to naturally occurring chemicals in foods.

– Symptoms: Symptoms are generally less severe than allergies and may include bloating, gas, diarrhoea, constipation, cramping, and headaches. These symptoms tend to appear more gradually and can occur hours or even days after consuming the problematic food.

– Onset: The onset of symptoms is typically slower compared to food allergies and depends on the quantity of the problematic food consumed.

Key Differences:

– Mechanism: Allergies involve the immune system and can be life-threatening, while intolerances involve the digestive system and are generally less severe.

– Symptoms: Allergic reactions can include symptoms beyond the digestive system and can be severe and rapid, whereas food intolerances primarily cause digestive discomfort that appears gradually.

– Severity: Food allergies can lead to anaphylaxis, requiring emergency medical treatment. Food intolerances, while uncomfortable, are not life-threatening and can often be managed by limiting or avoiding the problematic food.

Understanding the difference between these two reactions is crucial for proper diagnosis and management, often involving avoidance of the trigger foods and, in the case of allergies, carrying emergency medication such as epinephrine.

Key ingredients

  • Almond
  • Banana
  • Beef
  • Coffee
  • Cow’s Milk
  • Egg White
  • Egg Yolk
  • Gluten
  • Oat
  • Peanut
  • Pork
  • Sugar
  • Tea
  • Wheat
  • Yeast


  • Acai Berry
  • Burdock Root
  • Chamomille
  • Coffee
  • Cow’s Milk
  • Elderberry
  • Elderflower Mix
  • Ginseng (Korean)
  • Ginseng (Siberian)
  • Goat’s Milk
  • Grape (Cabernet Sauvignon)
  • Grape (Chardonnay)
  • Grape (Concord)
  • Grape (Malbec)
  • Grape (Merlot)
  • Grape (Pinot Grigio)
  • Grape (Pinot Noir)
  • Grape (Red Zinfandel Mix)
  • Grape (Riesling)
  • Grape (Sauvignon Blanc)
  • Grape (Syrah/Shiraz)
  • Grape (White Zinfandel)
  • Green Tea
  • Guarana
  • Hibiscus
  • Rosehip
  • Sheep’s Milk
  • Tea


  • Abalone
  • Anchovy
  • Cod
  • Crab
  • Cuttlefish
  • Eel
  • Haddock
  • Herring
  • Lobster
  • Mackerel
  • Mussel
  • Oyster
  • Plaice
  • Prawn
  • Salmon
  • Sardines
  • Scallops
  • Shrimp
  • Sole
  • Trout
  • Tuna
  • Vendance


  • Apple
  • Apricot
  • Avocado
  • Banana
  • Bilberry
  • Blackberry
  • Blackcurrant
  • Blueberry
  • Boysenberry
  • Cantaloupe
  • Cherry
  • Cloudberry
  • Coconut
  • Cranberry
  • Cucumber
  • Gogi Berry
  • Grapefruit
  • Honeydew
  • Kiwi
  • Lemon
  • Lime
  • Lingonberry
  • Lychee
  • Mango
  • Mulberry
  • Olive
  • Orange
  • Papaya
  • Peach
  • Pear
  • Pineapple
  • Plum
  • Pomegranate
  • Prune
  • Pumpkin
  • Raspberry
  • Strawberry
  • Tamarind
  • Tomato
  • Watermelon


  • Barley
  • Buckwheat
  • Corn (Maize)
  • Dinkel Flour (Spelt)
  • Gliadin (Gluten)
  • Hops
  • Malt
  • Millet
  • Oat
  • Quinoa
  • Rice
  • Wheat
  • Wheatgrass

Herbs and spices

  • Agar Agar
  • Anise Seed
  • Basil
  • Bayleaf
  • Cardamom
  • Cassia
  • Chilli Pepper
  • Cinnamon
  • Clove
  • Coriander
  • Cumin
  • Curry Leaves/Curry Powder
  • Dill
  • Garlic
  • Ginger
  • Jasmine
  • Juniper berry
  • Lemongrass
  • Mint
  • Mustard Seed
  • Nutmeg
  • Paprika
  • Parsley
  • Peppercorn
  • Saffron
  • Sage
  • Thyme
  • Turmeric
  • Vanilla


  • Beef
  • Chicken
  • Deer
  • Duck
  • Goat
  • Lamb
  • Pheasant
  • Pork
  • Turkey

Nuts and plants

  • Agave
  • Almond
  • Aloe Vera
  • Bamboo
  • Brazil Nut
  • Carob
  • Cashew Nut
  • Chia Seed
  • Chickpea
  • Cocoa Bean
  • Cola Nut
  • Flax (Linseed)
  • Hazelnut
  • Hemp
  • Oak
  • Okra
  • Peanut
  • Rocket (Arugula)
  • Sesame Seed
  • Seaweed
  • Spirulina
  • Sugar Cane
  • Sunflower Seed
  • Tamarind
  • Tapioca
  • Walnut


  • Asparagus
  • Aubergine (Eggplant)
  • Bean sprouts
  • Beetroot
  • Bok choi
  • Broccoli
  • Brussel Sprouts
  • Cabbage
  • Carrot
  • Cauliflower
  • Celery
  • Haricot Bean
  • Kale
  • Kidney Bean
  • Lentils
  • Lettuce
  • Lotus Root
  • Mushroom
  • Onion
  • Parsnip
  • Pea
  • Peppers (Capsicum)
  • Potato
  • Rhubarb
  • Soybean
  • Spinach
  • String Bean
  • Swede
  • Sweet Potato
  • Turnip
  • Water chestnut

The accuracy of food intolerance tests varies greatly among different providers. Bargain-priced tests can be found on discount platforms such as Groupon or via sponsored ads in search results for ‘food intolerance tests’. However, the credibility and advantages promised by these tests are frequently overstated, and numerous tests have no scientific backing whatsoever.

Many firms now offer hair testing as a method to identify foods that may cause adverse reactions. They instruct individuals to send a small hair sample to a ‘laboratory’ where it is supposedly scanned to detect ‘intolerances.’

Consider this: Is it feasible for the energy fields of a strand of dead hair to determine food intolerances? The straightforward answer is that it’s not possible – so you might want to hold onto that lock of hair. The assertions made by companies about diagnosing food intolerances through hair samples lack scientific credibility. There’s no room for doubt here; hair does not contain or emit any indicators of food intolerance.

Numerous such services are promoted online, making unfounded claims with no scientific foundation.

Virtual Consultations
In-Person Consultations
Harley Street Dietitians
Specialised in Weight Loss
Award-Winning Dietitian
Best Nutritionist in Europe
London Clinic
Over 1 Million Followers
Registered Dietitians

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