Soy allergy is a common food allergy, particularly in children, resulting from an immune system reaction to soy proteins. Found in a variety of foods and products, soy can trigger reactions ranging from mild symptoms to severe allergic responses like anaphylaxis. Soy allergy is often seen in early childhood, and some children may outgrow it over time....


What are symptoms of soy allergy?

  • Hives or skin rash
  • Itching around the mouth or other body parts
  • Swelling of the lips, tongue, throat, or face
  • Gastrointestinal symptoms like nausea, vomiting, diarrhea, or abdominal cramps
  • Wheezing, runny or stuffy nose, difficulty breathing
  • Anaphylaxis in severe cases

What foods cross-react with soy allergy?

People with soy allergies may also be sensitive to other legumes, though cross-reactivity is generally low. However, they should be cautious with:

  • Peanuts (also a legume)
  • Other beans and legumes like lentils, chickpeas, and peas
  • Some individuals may react to other allergens due to shared protein structures.

When should I consider getting a soy allergy test?

  • If experiencing allergic reactions after consuming soy-based products.
  • In infants or children who react to soy formula or foods containing soy.
  • If there’s a history of other food allergies, especially legume allergies.
  • Prior to introducing soy into a child’s diet, particularly if there’s a family history of allergies.

How do I reduce my soy allergy symptoms?

  • Avoid foods and products containing soy ingredients.
  • Read food labels carefully, as soy is a common ingredient in processed foods.
  • Be aware of alternative names for soy, including soy lecithin, soy protein, and tofu.
  • In restaurants, inform staff about the soy allergy to avoid cross-contamination.
  • For mild reactions, over-the-counter antihistamines might be effective.
  • Carry an epinephrine auto-injector if there’s a risk of severe reactions.
  • Consult with an allergist for specific advice, especially regarding the introduction of soy in diets and potential allergy testing.

Test(s) that measure/test for Soy

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