Soy allergy is a type of food allergy. It is a hypersensitivity to dietary substances from soy causing an overreaction of the immune system which may lead to severe physical symptoms for millions of people.[1] The Asthma and Allergy Foundation of America estimates soy is among the nine most common food allergens for pediatric and adult food allergy patients.[2] It is usually treated with an exclusion diet and vigilant avoidance of foods that may be contaminated with soy ingredients. The most severe food allergy reaction is called anaphylaxis[3] and is a medical emergency requiring immediate attention and treatment with Epinephrine.