Food Sensitivity Testing 

 

Food sensitivities are recognized to be correlated with many chronic health conditions, such as IBS, eczema, fatigue, and others - but with proper identification and elimination of offending foods, many experience relief from their symptoms. 

 

 
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 Order Test Kits | Testing Options | Panel Options | Testing Information | Sample Collection | FAQ

 

What is a Food Sensitivity?

 

Food sensitivities are inflammatory responses of the immune system triggered by food allergens. Unlike food allergies, the symptoms of a food sensitivity often occur hours or even days after exposure, making it difficult to pinpoint the specific offending food(s). This delayed reaction is what causes the majority of the 12 million people estimated to suffer from food sensitivities unaware and blaming things like aging for their chronic symptoms. 

Testing for food sensitivities streamlines the process of identifying triggering foods, providing clear evidence and guidance to begin the healing process and start improving symptoms. 


 

Importance of Testing Options

 

When testing for food sensitivities, US BioTek uses three main immunoglobins, IgG (1,2,3), IgA, and IgG4. We test these antibodies separately to establish a clear picture of what food triggers may be the root cause of patients’ symptoms. 

 

Immunoglobulin G1-3 or IgG 

IgG is an antibody that can activate the pro-inflammatory complement system (complement cascade) associated with chronic inflammatory conditions. High levels of IgG (class II or higher) overload receptors and drive the inflammatory reaction while low levels of IgG (class 0/I) indicate tolerance.  

IgG testing is the most commonly performed food sensitivity testing and foods that are only high in IgG can often be safely re-introduced after a period of abstinence. 

 

Immunoglobulin G4 or IgG4 

IgG4 is an antibody which in most people does not activate the complement system, but instead is a “blocking antibody” for IgE. The presence of IgG4 is protective, not inflammatory, as IgG4/IgE binding tends to decrease IgE hypersensitivity (true allergy). If IgG4 is high, testing for IgE reactivity is advised and it may be best to remove the food from the diet permanently.  

 Independent increases in IgG4 only can be associated with certain autoimmune conditions such as eosinophilic esophagitis. 

 

Immunoglobulin A or IgA 

IgA is an antibody that can activate the pro-inflammatory complement system. Unlike Secretory IgA (sIgA) in stool, which is two IgA molecules bound together and secreted into the gut, serum IgA levels are associated with allergies and asthma. A Serum IgA reaction to food triggers can indicate foods that are irritating the lining of the gut. 

 

 

Panels To Fit Your Diet 

 

Food and cuisine create a beautiful foundation for cultures around the world. Depending on regionality, ethnicity, personal preferences, and more, the foods that make up an individual's diet can vary greatly. To ensure our practitioners have access to food sensitivity panels that fit the diets of their patients and address as many relevant antigens as possible, US BioTek has developed eight unique food panels. 

 

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Testing Information

 

Our food sensitivity panels utilize a quantitative ELISA (enzyme linked immunosorbant assay) analysis of the specific immunoglobin(s) IgG, IgA, and IgG4 identified for the chosen diet panels’ food and spice analytes. 

We follow a meticulous process to extract the critical component from each analyte (food trigger) to ensure the antibody present in the patients’ sample will bind properly and validate results with positive and negative controls. Once attached to the antigens, antibodies are detected through spectrophotometric analysis, where the values are directly proportional to the concentration of the analytes in the sample. For additional accuracy, we perform duplicate testing to ensure there are no discrepancies. 

More information on ELISA 

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Sample Collection Methods

Blood Spot

Dried Blood Spot Collection

 

The dried blood spot collection method utilizes a simple finger prick and collection card. This method is ideal drop shipping to telehealth patients and clinics without venipuncture capabilities. 

View Collection Instructions >> 

serum

Serum Collection 

 

 

The serum collection method requires a modest blood draw. 

 

View Collection Instructions >> 

Educational Resources

5 min read

Likely reasons for unlikely low IgG results

There are many different reasons for unexpected IgG results. Pre-analytical errors, which are outside of laboratory...

8 min read

The difference between Celiac disease & non-Celiac gluten sensitivity

The scientific community is finally documenting what Naturopathic physicians and functional medicine practitioners have...

10 min read

Cross-Reactivity: More Than Foods are Causing Your Patients’ Suffering

Up to 60 percent of all food reactions occur because of cross-reactions between food and pollen. A great example is...

FAQ

Order a Food Sensitivity Test

 

  • Step 1: Create a US BioTek Account

     

    We invite licensed healthcare providers to set up an account with us.

    CREATE ACCOUNT

  • Step 2: Request Specimen Collection Kits

     

    Test kits are available to registered providers upon request. Use our online submission form to order the collection kits you require.

    REQUEST KITS

  • Step 3: Collect Specimen

     

    Easy collection and low volume specimen requirements are advantages of the US BioTek testing methodology. Follow our simple instructions.

    HOW TO COLLECT

     

  • Step 4: Order Tests

     

    Upon completion of specimen collection, complete our test requisition form and include it in your specimen shipment.

    ORDER TESTS

  • Step 5: View Results

     

    Providers can view and download results through our secure Clinician Portal, or request results by email.

    Please note that US BioTek does not discuss test results directly with patients. Practitioners assume the responsibility of relaying test results to their patients. All results are confidential.

    VIEW RESULTS

 
  • Step 1: Create a US BioTek Account
  • Step 2: Request Specimen Collection Kits
  • Step 3: Collect Specimen
  • Step 4: Order Tests
  • Step 5: View Results

Step 1: Create a US BioTek Account

 

We invite licensed healthcare providers to set up an account with us.

CREATE ACCOUNT

Step 2: Request Specimen Collection Kits

 

Test kits are available to registered providers upon request. Use our online submission form to order the collection kits you require.

REQUEST KITS

Step 3: Collect Specimen

 

Easy collection and low volume specimen requirements are advantages of the US BioTek testing methodology. Follow our simple instructions.

HOW TO COLLECT

 

Step 4: Order Tests

 

Upon completion of specimen collection, complete our test requisition form and include it in your specimen shipment.

ORDER TESTS

Step 5: View Results

 

Providers can view and download results through our secure Clinician Portal, or request results by email.

Please note that US BioTek does not discuss test results directly with patients. Practitioners assume the responsibility of relaying test results to their patients. All results are confidential.

VIEW RESULTS