Causes and Symptoms

Published on Sunday, 24 June 2012 12:28


A soy allergy occurs when the immune system treats a particular protein in soy as a threat to the body. Immunoglobulin E, or IgE, is an antibody that is produced by the body to attack the food protein (the antigen).  Once the antibodies have contact with the antigen it signals an attack on the protein by releasing histamine and other chemicals. These chemicals cause the allergic symptoms. Each type of food has its own proteins. A person may become allergic to one protein or more than one.


  • Wheezing, difficulty breathing
  • Runny nose, congestion
  • Hives
  • Swelling of the lips, eyes, face, tongue and/or throat
  • Mouth tingles or is itchy
  • Skin rash (note: eczema is a common skin condition often associated with food allergies, see your doctor for proper diagnosis)
  • Diarrhea
  • Loose stools
  • Dizziness, lightheadedness
  • Cramps
  • Vomiting
  • Coughing
  • Asthma
  • Anaphylaxis (can occur in some severe cases) Anaphylaxis is when the throat swells making breathing difficult because the airways constrict.  Other symptoms may include a rapid pulse, dizziness, shock, and lightheadedness.  This is life threatening and needs to be treated immediately by a clinician.