Those allergic to soy protein should always read food ingredient labels carefully and avoid any foods containing soybean, including the substances listed below. Caution should be exercised when dining at Asian restaurants or when using Asian sauces, which may contain soy.
Soy allergy can also manifest itself as urticaria, rash, redness (inflammation due to immune system response) and severe itching of the skin. These symptoms can happen immediately, but may also manifest a day (or even days) after consuming soy protein.
Some products [for reasons having to do with national regulation of soy products] don't list soy protein or soy flour on their ingredients labels, yet they still contain soy. There are still many latent issues resolving how soy should be regulated.
Products containing soy protein include:
The following food additives may contain soy protein:
Many people with soy allergy can tolerate small to moderate amounts of soy protein: the typical dose needed to induce an allergic response is about 100 times higher than for many other food allergins, with 90% of sufferers being able to tolerate doses up to 400mg. As a result, not all of those allergic to soy need to avoid very minor sources of soy protein such as soy oil or soy lecithin.
Salbutamol/ipratropium Bromide: Angioedema and Paradoxical Bronchoconstriction in Patients with Soy Allergy: 4 Case Reports
Jun 09, 2012; Two children and two adults with asthma developed angioedema and paradoxical bronchoconstriction following administration of...
Allergenicity of Soybean: New Developments in Identification of Allergenic Proteins, Cross-Reactivities and Hypoallergenization Technologies
Feb 15, 2007; Soybean is considered one of the "big eight" foods that are believed to be responsible for 90% of all allergenic reactions. Soy...
Nutrition Hotline: this issue's Nutrition Hotline addresses questions surrounding soy allergies and examines whether soy consumption during adulthood is harmful to one's health.
Oct 01, 2008; QUESTION: "Two of my family members developed serious allergic reactions to soy foods. Have you heard of a lot more of this sort...