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What is IgE Allergy Testing?

What is an IgE Allergy Test?

With so many options for allergy testing, it can be hard to figure out which kind you should go for. You may have come across the term ‘IgE allergy testing’ here and there but aren’t sure what it means. We’re here to clear up the confusion.

What does IgE mean?

An IgE allergy test is a scientifically proven allergy test that uses a blood sample to determine if you have an allergy to certain substances. It tests for the antibody immunoglobin E (IgE), after exposing the sample to certain substances. If the patient is suffering from an allergy, the antibody will become present. The higher the levels of IgE, the more likely you are suffering from an allergy.

Not all Allergy Tests will Test for IgE

First of all, not all allergy tests are IgE allergy tests. The allergy test that doctors prefer to perform – the skin prick test doesn’t test for Immunoglobin E. This test only looks for a visual response on the surface of the skin – after puncturing suspected allergens into the skin. Although the reaction is caused by IgE antibodies, it doesn’t detect IgE’s for certain. While not all allergy tests are IgE, blood allergy tests are usually IgE allergy tests.

Pros of IgE over other Allergy Tests

One of the main benefits of IgE allergy testing over traditional skin-prick testing is that there is no risk of a reaction during testing. Because the patient doesn’t come into contact with any allergens during testing, there’s virtually no chance of adverse reactions occurring or skin reactions developing. There’s also the benefit of only 1-3 punctures needed for the sample to be taken with IgE allergy testing. That’s a much lower puncture count compared to skin-prick testing which would require a puncture for each allergen tested.

IgE allergy testing is an excellent choice for people wanting an allergy test, without a trip to the doctors. It’s convenient, safe and can be done from the comfort of your own home.

What is an IgE Allergy Test?

What is an IgE Allergy Test?

Knowing what foods your body needs is fundamental to taking proper care of yourself.  But what about which foods your body doesn’t want? Food allergies are becoming more and more common in the UK. And as more people dive into the world of food allergies, an IgE test is key in understanding what’s going on in our bodies and how best to take care of ourselves.

Allergy Testing

An IgE food allergies test is a lab-driven test designed to determine how your body reacts to certain food allergens.  There are hundreds of potential allergens in the world of food, and the only way to know for certain what is causing your body to have an allergic reaction is to test against all of them.

Multiple Options for Testing

There are several options for testing for food allergies.  The first option is a skin prick test.  This uses small allergen samples under the skin to elicit a reaction in your body by creating a rash.  But when it comes to food allergens, this isn’t always the best result.  Another option — with arguably better results — is a blood test.  This uses a sample of blood to rest against hundreds of food ingredient allergens to determine which ones create a reaction.  The least popular option is the idea of a hair root test.  Using a sample of hair (with the root) to determine which ingredients cause a reaction. 

What is the IgE Allergy Blood Test?

An IgE allergy test is an analysis of a sample (usually blood) where the lab check for an IgE-mediated immune response when exposed to certain allergens. An allergy is a type I hypersensitivity meaning that exposure to an allergen results in the production of immunoglobulin E (IgE) antibodies, the release of histamine and symptoms (which may lag behind the other responses). Allergens are usually easy to identify due to the quick nature of the reaction.

This is the most efficient method for allergy testing against multiple foods. A small blood sample can be subject to hundreds of common allergens and complete results can be ready very quickly.

Fast and Effective Results

With food allergy testing you get concrete results, for an abundance of allergens, in very little time. This will allow you freedom over your diet and food choices again, without the fear and uncertainty of whether your meal will stir up trouble.  You’ll see in intricate detail what makes your body react and why. Helping you avoid any future reactions to food, which is great for those who have a history of moderate to severe reactions. Although, since one reaction doesn’t accurately indicate the severity of future reactions — i.e. a mild reaction can easily grow into a severe one — knowing what to avoid for your own safety is paramount.

You’ll Understand Your Body Better

If you decide to have proper IgE allergy testing, you’ll understand how your body reacts to the food that you are eating, and how avoiding these key ingredients will make you healthier in the long-term.  Having a food allergy is serious and important to know, but once you get the rest results back, you can back in control of your own body and be able to improve your overall quality of life as a result.

Food allergies are serious

Allergy Testing Can Stop You From Suffering Fatigue

Food allergy testing is often only given when there is a clear indicator that it is needed.  Particularly when teens or adults, where it’s commonly thought that the danger of an allergy developing has passed.  However, allergy testing isn’t just required when a child, teen or adult has an anaphylaxis-related reaction.  Sometimes it’s simply a bloated stomach or even fatigue.  There is no “one size fits all” for a food allergy, which is why education is important.

How allergies relate to fatigue

Since we know that a food allergy occurs when your body’s natural system starts to protect itself from what it perceives as a threat (ie: the allergen), fatigue is actually a really common symptom of a food allergy, though it’s often ignored and attributed to other issues. 

As your body fights the allergen, the same hormone that is released to fight it, also makes you feel tired and hazy.  Similar to when you are overtired.  It can also keep you from sleeping well, if the allergic reaction occurs near bedtime.  This difficulty sleeping is also made worse by the fact that the same hormone can cause swelling in your nose, making you feel stuffy, which makes it hard to have a good night’s rest as well.

Examples of fatigue related to allergies

Fatigue and its connection to allergies can be felt in a few ways.  Here are some examples that you may have found in your everyday life that, until now, don’t really have a clear reason for happening.

  • Constant fatigue: If you feel like you are always ready to pass out from fatigue in the afternoon or evening, it could be due to something that you’re eating in a meal.  While slight fatigue is normal after a large meal, a traditional meal shouldn’t make you feel like you’re exhausted after it.
  • Difficulty sleeping: If you’re waking throughout the night or waking in the morning still feeling really dragged out or tired, it could be due to an allergen that is pushing those fatigue levels higher as well as keeping you from slipping into a deep sleep throughout the night.
  • Feeling fogged or hazy: Difficulty concentrating or simply feeling “hazy” or “out of it” is another version of fatigue that is often caused by a food allergen.  If you are struggling to stay on-task or focused on a conversation, this form of fatigue could be something to consider in terms of the root cause.

What to do

In fighting the reaction, the best thing that you can do is to take an allergy test.  This will help you figure out just what is triggering the fatigue so that you can avoid it.  If you accidentally ingest it, you’ll find that taking an anti-histamine can help curb the worst of your symptoms and get you back to your life as normal.  Allergy testing can help you beat fatigue for good.

For more information on battling fatigue and dealing with this annoying symptom, you can log on to and see how we can help!