The Difference Between Immediate and Delayed Food Allergies
- 19
- Aug
When immediate food reaction occurs, sufferers experience symptoms within hours of having ingested the food. Symptom onset is rapid and may include tingling of extremities, wheezing, coughing, tightening of the throat, nausea, abdominal cramps, and diarrhea. Sometimes in cases where nuts, shellfish, fish, and peanuts have been eaten anaphylaxis can occur.
Immediate food reaction is a fixed food allergy. The food to which you are allergic will almost always provoke an immune reaction when ingested. In immediate reactions the body over produces what is called Immunoglobulin E antibodies, (IgE). IgE binds to allergens and and triggers an allergic response to any substance it sees foreign. Often, the reaction isn’t severe the first time, rather it is the second time of exposure that the acute reaction can occur.
A food sensitivity, as opposed to a food allergy, happens gradually and isn’t life threatening. Symptoms of a delayed food allergy can take up to 72 hours to appear. This type of immune response is mediated by the IgG antibody, which 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. It can be difficult to identify the offending food since we eat so many foods that go through different processes and have many ingredients. It is estimated that 20% of the population have an adverse reaction to a certain food.
Food sensitivities may be caused by many factors such as stress, infections, overeating, artificial preservatives, additives, molds, pesticides, antibiotics, and environmental pollutants. Unidentified food sensitivities can then contribute to many chronic health conditions: including Irritable Bowel Syndrome, Rheumatoid arthritis, headaches, autism, ADD/ADHD, eczema, chronic ear infections, gut malabsorption, insomnia and many others.
Source: FoodAllergy.com (click to read the full article)
