IgG4 Food Antibodies 90 - Serum
IgG4 Delayed Food Reactions – More common than you think
IgG4 antibodies are associated with non-atopic or "delayed" food reactions that can worsen or contribute to many different health problems. These reactions are considered the most common form of immunologically mediated food intolerance. An IgG4 response to food is actually more common than the IgE response, which causes an immediate reaction. IgG4 acts as a blocking antibody, protecting the individual from potentially fatal IgE reactions. These reactions are more difficult to notice since they can occur hours or even days after consumption of an offending food. In some cases, a person's reaction to a food may occur several days after eating the offending food and the link between the food and their symptoms may not be connected. These "hidden" food allergies are caused by increasing blood levels of IgG4 antibodies in reaction to specific foods.
Why should I have food allergy/antibody testing?
Scientists estimate that approximately 12 million Americans suffer from food allergies.* A food allergy or sensitivity is an immune system response to a food that the body mistakenly believes is harmful. Once the immune system decides that a particular food is harmful, it creates specific antibodies to it. *www.foodallergy.org
Two major types of food reactions involve antibody production in your body:
Immediate Reactions to Foods (IgE)
Classic allergic reactions occur within 3 hours after eating. They are usually caused by high IgE antibody blood levels that produce an immediate allergic response. This allergic reaction may appear as a rash after eating foods like strawberries or crabmeat. The potentially fatal but very rare “anaphylactic” reaction after eating foods like peanuts or shellfish is another example of an “IgE” reaction.
Delayed Reactions to Foods (IgG4)
These reactions are much more difficult to notice since they can occur hours or days after consumption of an offending food. Yet, this “delayed” type of reaction is far more common than the immediate IgE type. In some cases, you may eat a food for several days before developing a reaction to it, so you may not realize the link between the food and
your symptoms. These delayed reactions to food are often referred to as “hidden” food sensitivities. They are caused by increased IgG antibody blood levels in reaction to specific foods. Often, the offending foods are hard to avoid and frequently eaten, such as milk, corn, and wheat.
Why should I have the Metametrix Allergix IgG4 Antibody Profile?
Food sensitivities can occur at any age, triggering many different symptoms and contributing to a variety of disorders including:
• Inflammatory bowel disease • Gas/bloating • Fatigue • Mood swings
• Anxiety • ADD/ADHD • Headaches/migraines • Skin problems • Rheumatoid arthritis • Sinusitis • Recurrent ear infections
Included with the Allergix IgG4 Food Antibody Profile test results is a Food Reaction Patient Guide which will provide information on how to interpret your results, build your own customized, 4-day rotation diet, dietary recommendations, and alternative food options.
Metametrix offers two Allergix IgG4 Food Antibody Profiles:
IgG4 Food Antibody Profile – measures serum levels of IgG4 antibodies specific to 90 food antigens. A four-day rotation diet is included.
Bloodspot IgG4 Food Antibody Profile – measures levels of IgG4 antibodies specific to 30 commonly offending foods from an easy-to-use finger stick. A four-day rotation diet is included.
Special Pricing is available for the following Allergix combination profiles:
0270 - IgG4 and IgE Food Antibodies
0278 - IgG4 Food Antibodies and Celiac Profile
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