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.