Soy Allergy: Symptoms and Treatment

Soy, milk and eggs are the three things that children are most likely to be allergic too, and can outgrow. While the use of soy is not very prevalent in the United States, it is used in a number of processed foods. Also, East Asian foods use it quite a bit, as do vegetarian diets.

Fortunately, the vast majority of people who suffer from soy allergies have very mild reactions to it. More often than not, it only causes hives, nausea, itching in the mouth (the so called oral allergy syndrome) or rhinitis. Sometimes it can lead to acne, eczema, nasal congestion, fever, fatigue and shortness of breath. In a few very rare cases, people have been known to suffer severe reactions – difficulty breathing and anaphylaxis, also know as anaphylactic shock. It is a very serious condition and can be fatal if left untreated. By definition, it is an allergic reaction that encompasses the entire body! It is the result of histamine being released, dilating the blood vessels and causing swelling, well… everywhere. When the swelling reaches the throat, it can lead to blockage of the airways. In addition, the dilating blood vessels usually cause a dramatic drop in blood pressure, which often leads to shock.

Also, very often, people with soy allergies suffer from other related allergies, such as peanuts. So, it is important to consult a physician and arrange for a full range of testing to determine exactly what foods to avoid. And, this then brings up the subject of food products and eating out. Fortunately, at least in the United States, foods containing soy must be labeled as having “soy,” “soybeans,” or “soya.” Still, it is wise to double check with your grocer if the label says “protein” or “starch.” As for restaurants, the best course of action is to call ahead and tell them of your dietary needs.

For a mild reaction, usually a simple over the counter antihistamine is fine. Most times, taking something like Benadryl, Claritin, Clarinex or using a nasal spray like Flonase will do the trick. But, in the case of a severe reaction, like anaphylactic shock, immediate medical treatment is recommended. If necessary, go to the nearest hospital emergency room, and they will administer epinephrine via an intramuscular injection, usually into the lateral thigh. Another option is to consult with your doctor about the possibility of getting an EpiPen. This is a device that contains a precise dose of epinephrine in a prepared syringe. In the event of anaphylaxis, you take the device out, push it against your bare thigh, and it automatically injects the medication into your body. Afterwards proceed at once to a hospital or see your doctor. Prompt medical attention is key to remaining healthy.