The IgE Test Explained: Screening For Food Allergies

Immunoglobulin E (IgE) is a type of antibody carried by humans and other mammals. It figures prominently in immunity responses and plays a pivotal role in allergic conditions like food allergy and anaphylactic shock. The antibody binds with the antigen. Mast cells then release histamine, and the allergic response occurs.

IgE Levels Read the Number of Antibodies in the Blood

An IgE test measures the blood level of the antibodies, a family of proteins referred to as gamma globulins. Antibodies are important weapons used by the immune system to detect and respond to the invasion of foreign substances like bacteria, viruses, and allergens.

IgE Triggers Allergic Responses

IgE is the primary mediator that stimulates the release of inflammatory agents in mast cells, such as histamine and leukotrienes. IgE also triggers the most devastating of allergic reactions, like anaphylactic shock.

Tests Need to be Interpreted by a Medical Professional

The IgE test may be done to screen for allergies. It is performed by taking a blood sample, which is sent to a lab for testing. The results are processed in a few days. An IgE test will tell you to what degree the body reacts to various types of food or particles and other allergies. A low score does not necessarily mean that a food is safe, but a high score definitely means there is a problem. An unusually low level can actually indicate a rare autoimmune disorder.

Low, Normal and High IgE Levels

A low IgE level is something like 4.2 units per milliliter. A high IgE level is above 592 units per milliliter. These high numbers could indicate an infection, cancer, allergic reactions or an autoimmune disease. Lots of things can trigger an elevated level, including animal dander, cockroaches, dust mites, mold, or airborne allergens. A normal IgE level is 4.2-595 U/mL, or 0.05 percent of the IgG concentration.

Photo: Pexels

Peanut Free Store

More Articles

You already know that if you or your child has a peanut allergy you need to avoid peanut butter. Some...

So many wonderful recipes call for peanut butter. These recipes can still be enjoyed by experimenting with peanut butter replacements.

...

Are you craving sweets? Those with peanut allergies must be especially careful when indulging their...

For those with peanut allergies, baked goods present a serious risk. Many baked goods do not appear to contain peanuts, yet were baked in a...

Those who have peanut allergies know to avoid peanut butter cookies, of course – but what about other...

For anyone who has had a peanut allergy diagnosis, it is necessary to avoid eating peanuts entirely. However,...

Are you looking for peanut-free candies as a special treat for a child with...

Do you know what's in the face paint often used for Halloween costumes, school carnivals, and other events? If you're worried about smearing...

Vegetable oil is healthy before it is hydrogenated and a process that requires adding hydrogen to unsaturated fats. Oils that are often...

Peanut allergies don’t begin to cause problems for people the first time they are exposed to peanuts. Rather, the immune system first develops...

Anxious food allergic kids, understandably concerned about avoiding allergens, can become so restrictive in their food choices that weight loss...

The relationship between anxiety and food or other allergy is a complicated and puzzling one. Research has shown that stress can exacerbate...

Welcome to PeanutAllergy.com. Before you begin you must verify your email address. Please check your email and click on the link and you will...

If you have a food allergy, you will probably need to make some changes to your diet...

When love is in the air we can get caught up in the moment and throw caution to the wind. However, if you have a...

Just 30 seconds of mindfulness, of quieting our thoughts by being attentive to the present moment, can help manage stress and anxiety.

The...

Those affected by peanut allergy might have heard about basophil activation tests (BATs), a potentially accurate tool for diagnosing food allergy...

When your child has a food allergy, you want to make sure they are safe in school...

It’s the time of year when holiday parties, and family gatherings can make allergen avoidance more problematic. Whether you celebrate Christmas,...

Food allergies and sensitivities are on the rise. Almost everyone knows someone who has problems with at least one food. The most common food...