Lymphocyte Response Assay (LRA) Testing

We have found the Lymphocyte Response Assay (LRA) by ELISA/ACT Technologies to be the most comprehensive and clinically relevant hypersensitivity test available today. It measures all hypersensitivity pathways with high precision and clinical significance.

The vast majority of people that have an issue losing weight (or body fat) have food sensitivities. These sensitivities can cause a myriad of symptoms including:

  • Gas
  • Bloating
  • Indigestion
  • Diarrhea
  • Constipation
  • Inability to lose weight
  • Weight fluctuations
  • Sleep disturbances
  • Migraines/headaches
  • Fatigue
  • Inflammation
  • Acid reflux
  • Irritable Bowel
  • Asthma
  • Allergies
  • Joint pain
  • Depression
  • Anxiety


The LRA requires an in-clinic or in-home blood draw; once a food hypersensitivity is found, a customized dietary program is designed for you to allow you to eliminate the offending foods. This test is the most accurate food hypersensitivity test available and measures every non-IgE (anaphylactic) immune reaction to food, including reactive antibodies (IgA, IgM and IgG), immune complexes and T cell activation.

This testing method also helps distinguish between reactive and protective antibodies, which means it will only provide information on harmful reactions (as opposed to other testing methods that cannot distinguish between harmful and protective antibodies, such as IgG testing, ELISA, ALCAT and SAGE testing) making your diet less restrictive. In addition, LRA tests are more reliable and comprehensive than RAST (IgE), IgG, and IgG4 tests. To learn more about key differences in these testing methods, click here.

This test requires a blood draw. If you do not have a blood draw station near you, in-home blood draws can be arranged; please click here for more information.

There are several different panels you can choose from; each panel includes a different number of foods. Testing options can also be customized to include non-food items, including environmental chemicals, additives/preservatives, molds, toxic metals, food dyes/colors, medication and/or therapeutic herbs or foods. Click here for a complete list of all LRA Testing Options. The most popular food block is the Food Block 166, which is the test we recommend for most people. If you would like to run a different testing block, please contact us.

A copy of the test results will be sent to you along with a detailed report outlining recommendations to correct any imbalances present.

If a blood draw is not possible or desirable, the Bloodstick IgG4 Food Antibody Profile is the best choice to help determine possible food allergens.