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What Is Food Sensitivity Testing?

Test your intolerance with food sensitivity. Food sensitivity is your body’s response (IgG antibody reactions) to certain foods that occur hours to days after certain foods are consumed. These are also termed as delayed food reactions.

How Is This Different From Food Allergy?

Your immune system produces two types of antibodies against certain foods:

  • Immunoglobulin E(IgE)
  • Immunoglobulin G(IgG)

Food Allergies

Food Allergies are immediate reactions and can occur within minutes of consuming the reactive food.

This involves IgE antibodies and may cause

  • Breathing issues
  • Digestive disorders
  • Skin rashes

In certain rare cases, it may be life-threatening when it leads to anaphylaxis.


Since food sensitivities are delayed reactions, testing is the only way to determine which foods are responsible for the reaction. IgG reactions frequently occur to commonly consumed foods such as dairy, wheat, eggs, yeast, pork and soy.

Vibrant Uses A Silicon Chip

Vibrant is the only company that utilizes a chemiluminescent method of detecting food sensitivities on a silicon chip. While other labs use ELISA methods, the proprietary technology enables them to provide the highest sensitivity of detection.

All 96 tests are performed in a single reaction vessel enabling the best accuracy and precision.

IgG and IgA Antibodies Determine Mucosal Damage

Vibrant tests for IgG and IgA antibodies to food. IgA antibodies provide protection from mucosal damage. IgA reactivity to foods indicates mucosal damage. If IgG reactions are negative and you are still symptomatic, IgA reactivity helps provide solutions.


Some Symptoms That May Indicate a Food Sensitivity

  • Abdominal Pain
  • Gas
  • Bloating
  • Nausea and vomiting
  • Skin itchiness and redness
  • Rashes like eczema
  • Bronchitis and asthma symptoms
  • Musculoskeletal joint pain
  • Muscle stiffness and swelling
  • Fever
  • Fatigue
  • Sweating and feeling weak

Rotation Diet/Elimination of Foods


Once we receive your results, we can help you formulate a plan to rotate your diets and or eliminate the problem foods from your diet. Most people see improvement of symptoms within a few weeks of eliminating the reactive foods or after going on a rotation plan. However, it is important to understand that symptom improvement make take some time, and results vary from individual to individual. Removing reactive foods from the diet can sometimes result in withdrawal symptoms like headaches, tiredness, irritability and hunger.

Intestinal Permeability and Food Sensitivity

Your intestinal lining. in a healthy state will provide immunity against exposure to food antigens. 

Foods are not supposed to cross the intestinal barrier to enter your bloodstream. 

However, inflammation in the gut lining caused due to 

  • Abnormal gut flora
  • Stress
  • Certain drugs/medications
  • Alcohol

Inflammation can cause the food particles to break the barrier and enter the bloodstream where they cause an IgG antibody response

What is the Distinction Between IgG and IgA Antibodies?

  • A primary piece to understanding antibodies is their area of origin. IgA antibodies are produced by saliva, tears, and mucous linings in the lungs and the intestines. IgG antibodies are the most abundant in serum and are produced by almost every cell in the body. IgG antibodies can cross the placenta.These antibodies also have considerably different half-lives. IgA antibodies have a half-life of ~6 days. Elevated IgA antibodies indicate exposure 8-12 days ago. The half-life of IgG is much longer and individually variable and can indicate prolonged exposure/sensitivity.
  • IgA antibodies are produced by the intestinal mucosa as a defense mechanism. If IgA antibodies are elevated to a particular protein (antigen), this can indicate an immune response to mucosal irritation or damage. Elevated IgG antibodies means that there is exposure of these food to the bloodstream and the body is producing antibodies.
  • In terms of food sensitivities and intestinal autoimmune disease, IgG antibodies can occur as a consequence of and can be downstream to intestinal permeability. These are likely correlated with more systemic immune responses (brain fog, fatigue, skin, migraines, etc). Vibrant Wellness does not measure IgG subclasses.
  • As with all immunoglobulin testing, it is important to evaluate the person’s baseline levels of (total) IgA and IgG. These biomarkers are included in the Vibrant Wheat Zoomer.

See a sample report here

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