IgG Food Intolerance Testing may help to identify which proteins of certain foods are causing an unwanted inflammatory response in the body.

What are the symptoms of food intolerances?

There are a variety of symptoms which may indicate food intolerances:

  • Bloating
  • Constipation/Diarrhoea
  • Headaches/Migraines
  • Low energy levels
  • Decreased concentration (e.g. 'brain fog')
  • General feeling of unwell
  • Weight control problems
  • Nutritional malabsorption (e.g. deficiencies)
  • Irritable Bowel Syndrome (IBS)
  • Inflammatory Bowel Disease (IBD)
  • Chronic Fatigue Syndrome (CFS)

As symptoms are not life threatening, individuals may live with these symptoms for several months or years before they are diagnosed.

What foods are tested for?

Coastal Dietetics tests for the IgG antibody reaction to 59 commonly eaten foods, as detailed below:

  • Cereals (Corn, Durum Wheat, Gluten, Oats, Rice, Rye, Wheat)
  • Nuts & Beans (Almond, Brazil Nut, Cashew, Cocoa Bean, Olive, Peanut, Legumes (Pea, Lentil, Haricot), Soya Bean, Walnut)
  • Meats (Beef, Chicken, Pork, Lamb)
  • Fish (Salmon, Trout, Tuna, Haddock, Cod, Plaice, Shellfish (Shrimp, Prawn, Mussel, Crab, Lobster))
  • Vegetables (Broccoli, Cabbage, Carrot, Celery, Cucumber, Leek, Peppers (Red, Green, Yellow), Potato)
  • Fruits (Apple, Blackcurrant, Grapefruit, Cantaloupe, Watermelon, Orange, Lemon, Strawberry, Tomato)
  • Other (Egg, Cows Milk, Garlic, Ginger, Mushroom, Tea, Yeast)

Treating Food Intolerances

If you test positive for any of the food groups in the test, the simple act of reducing or eliminating the food from your diet for a certain period of time will provide enormous benefit. The amount of time the food is reduced/eliminated in the diet will depend on your regular intake of that specific food; your dietitian will advise of recommended time frames for your specific situation.

IgG Food Intolerance Results

You are able to receive your Food Intolerance results the following week. A 15 minute results consultation is included with the purchase of the Food Intolerance Test.

What are the costs involved?

Consultation*: $95 (30mins)
IgG Food Intolerance Test: $295 (includes test + 15min results consultation)

*A consultation is mandatory for any client who is new to Coastal Dietetics. This consultation ensures that there are no contraindications to your doing a Food Intolerance Test, and ensures that a Food Intolerance Test is your most suitable option. If this consultation is done face to face, we will collect your finger prick blood sample at the end of the consultation for the Food Intolerance Test.

Preparing for the Test

  • No anti-inflammatories (e.g. Ibuprofen) or antibiotics 48 hours prior to your test
  • Drink plenty of water 48hours prior to your test
  • Ensure you have consumed a small portion of each food on the food list at least 1month prior to the test to avoid any false negative readings

Frequently Asked Questions

Q. Is it possible that I am affected by foods that are not detected by this IgG food test? 

Yes, some foods may cause a classic allergic reaction involving the production of IgE antibodies. These will not be detected in an IgG food test. There are also many foods that can cause a reaction in the body without involving the immune system but produce symptoms similar to IgG reactions. For example, amine in chocolate, cheese and red wine may cause migraines; MSG in Chinese dishes can produce sweating and dizziness; and ‘nightshade’ alkaloids in potatoes, tomatoes and peppers may affect the joints. Food intolerance may also be due to a deficiency of a particular enzyme, as in lactose intolerance. 

Q. I have been avoiding a food for several months / years; will this affect my test results? 

The IgG food intolerance test is based on your immune system producing antibodies in response to eating certain foods. If you have been avoiding a particular food for more than 3 months, it is likely that the test will be unable to detect any antibodies and therefore will show as a negative response. To test tolerance to a certain food you should include it in your diet daily for at least 4-6 weeks before testing.

Q. If cows milk comes up positive, does that mean I am lactose intolerant? 

No. Lactose intolerance is the inability to digest lactose, the major sugar found in mild, and is caused by a deficiency of the enzyme lactase. The food intolerance test detects whether you have an intolerance to the proteins in dairy which are known as casein. 

Q. Is gluten free the same as wheat free? 

No. A product can be wheat free but not gluten free, and vice versa. You can buy products that are both gluten free and wheat free. It is important to read ingredient labels to be certain. 

In the food intolerance test, the wheat, barley and rye food samples have had the gluten (gliadin) removed and this is tested separately. Therefore, if you show a reaction to wheat, rye or barley, the reaction may be due to any of the other proteins in the grains. However wheat, barley and rye all contain gluten naturally and therefore, if you test positive for gluten, you should also avoid eating these foods. Your Dietitian can help you find suitable alternatives. 

Q. If I come up positive to wheat, does that mean I have coeliac disease? 

No, coeliac disease is an autoimmune disease that results in the severe reaction to gluten, a protein found in wheat, barley and rye. Our wheat extract does not contain gluten, and therefore a positive result for wheat only indicates an intolerance to wheat proteins, not to gluten. 

Q. Are these tests suitable for children? 

We recommend a lower age limit of 2 years or older. 

Q. Do I need to have a re-test after a few months? 

Most people do not need to have a re-test, but if you would like another test we usually advise a period of 12months in between tests. If your symptoms have improved and you have been able to successfully reintroduce the foods, then a re-test is unnecessary. 

Q. Why do I react against a food I have never eaten? 

It is occasionally observed that reactions with foodstuffs occur, although the client is convinced of never having eaten the item. This may therefore be as a result of either cross contamination (and the client has consumed the food item without realising it) or through cross reaction. A cross reaction occurs when food items have similar / identical molecules, which can then be recognised by the body as an antigen. 

Book Now

It's easy to book your Food Intolerance Test with Coastal Dietetics. Just click the "Book Now" button to be taken to our booking page where you can make your booking online.