A case of adult onset severe soy allergy is discussed. The allergen protein involved did not correspond to those presently detectable by commercial diagnostic means, but was not identified, possibly due to the insufficient level of specific IgE. Fresh foods and commercial food extracts remain an invaluable tool to support the diagnosis of food allergy, both in-vivo and in-vitro.
Keywords: adult; anaphylaxis; food allergy; soy allergy; soybean.