Unidentified food sensitivities can contribute to many chronic health conditions: including Irritable bowel syndrome, Reflux & Heart Burn, Rheumatoid Arthritis, Headaches, Autism, ADD/ADHD, Eczema, Chronic ear infections, malabsorption, insomnia and many others.
Types of Reactions:
Immediate Food Reaction As the name implies, this food reaction can occur within minutes or up to 3 hours after ingestion. The reaction is caused by the presence of a high IgE antibody levels in the blood, which sets off an immediate allergic response. IgE antibodies make up only a small percentage of our immune system, but exert the most severe reactions. Symptoms can include rashes or full body hives after eating an apple, a swollen throat after ingesting peanuts or an intense headache after drinking wine.
Delayed Food Reaction Delayed food reactions can occur up 72 hours after ingestion of the reactive food, making it difficult to link one’s symptom to the food eaten several days ago. Such hidden allergies are often the cause of many “chronic symptoms.” The immune response to delayed food reactions are often caused by antibodies other than IgE. They are IgG, IgA, IgM and IgD. The IgG antibody is the largest circulating antibody in our immune system and can cross the placenta from mother to child. IgG antibodies are the most common form of immunologic-mediated food responses. These antibodies combine with the food particles in the blood to form “immune complexes” which cause inflammatory reactions in tissues. Such inflammatory reactions can occur in any part of the body, thus producing many kinds of symptoms such as headache, eczema, joint pain, mental disorders, etc.
Diagnosis of Food Allergies Obviously, immediate food reactions can be identified easily. However, delayed food reactions are much more difficult to diagnose. According to recent research, IgE antibodies cause immediate food reactions and delayed food reactions are often associated with IgG antibodies. We test for both IgE and IgG reactions in our Comprehensive food panels via a blood test. This test has a 99% sensitivity and reproducablitiy, and a 15% false negative. What the false negative means exactly is if you’ve avoided any particular foods for greater than 3 months, they will may not show up on your results if you are reactive. To correct for the 15% false negative, it is advisable to have a liberal diet for several weeks prior to your blood draw.
Scroll to the bottom of this page to view a list of all foods available for testing.