How is soy allergy diagnosed?

Your healthcare provider will examine you after asking for a medical history. You might be asked to keep track of your food and any symptoms you might have.

There are other tests for soy allergy. They are:

  • A blood test: A blood sample will be tested for immunoglobulin E (IgE) antibodies to soy. This may indicate an allergy.
  • A skin-prick test: A drop or two of liquid composed of soy protein is put on your back or on your forearm. A sterile probe pokes the area which lets the liquid get into the skin. If your skin produces a red bump in about 15 minutes, you might be allergic.
  • An oral food challenge: You will be asked to eat some type of soy food item. This will happen at the doctor’s office or a special food challenge center with medication and emergency equipment ready to deal with any reaction.

Last reviewed by a Cleveland Clinic medical professional on 10/02/2018.


  • Food Allergy Research & Education. Soy Allergy. Accessed 10/4/2018.
  • Soyfoods Association of North America. Soy Allergies. Accessed 10/4/2018.
  • American College of Allergy, Asthma & Immunology. Soy Allergy. Accessed 10/4/2018.
  • Expert knowledge and experience of healthcare providers at Cleveland Clinic.

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