Soy allergy is a common food allergy that causes a malfunction in your immune system. As soy is a legume, this may be a sign of possible allergy to other legumes, such as peanuts, beans or lentils. The most effective way to avoid an allergic reaction to soy products is to eliminate soy from your diet. Soy is found in uncommon places, such as cakes, ice cream and processed meats. Talk with your doctor before modifying your diet.
Description
An allergic reaction to soy will begin shortly after ingesting any product that contains soy. If you are allergic to soy, your immune system will overreact to the proteins in the soy. The reaction causes the body to defend itself by creating immunoglobulin E, or IgE, antibodies. These complex compounds are intended to fight off the allergen and in turn cause mast cells to produce histamine. Histamine is a chemical in the body that protects it from infection, but in higher doses it causes inflammation in tissue.
Common Symptoms
Soy allergy symptoms may include the following: diarrhea, vomiting, nausea, abdominal pain, cramping, hives, skin irritation, eczema, itching, swelling, shortness of breath, chest tightness, wheezing, coughing, nasal congestion, runny nose, sneezing, eye irritation and light-headedness. Symptoms can vary from minor to severe and should be evaluated by a doctor. Symptoms unrelated to an allergic reaction that may occur include: heartburn, gas, bloating, upset stomach, mild headache and dizziness.
Severe Symptoms
Severe symptoms may be a sign of anaphylactic shock, a potentially life-threatening condition. Severe allergic symptoms may include swelling in your face, tongue, throat or lips, hives and difficulty breathing. Anaphylactic shock is an allergic reaction that affects the entire body, sending it into a state of shock. Your blood pressure will drop, your heart rate will increase, and your chest will become tight. Call 911 or administer an injection of epinephrine if you have some available.
Diagnosis
If you experience common allergy symptoms after consuming soy products, your doctor may recommend allergy testing for a diagnosis. Allergy tests may include a skin test and a blood test to determine if your body creates IgE antibodies when the suspected allergen is introduced.
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