A soy allergy is due to an immune system reaction after contact with or ingestion of soy or soy derivative.
What foods have soy protein?
Soy protein can be found in tofu, tempeh, miso, textured vegetable protein, hydrolyzed protein, emulsifier, soy protein isolate, edemame (soy beans), soy sauce, tamari sauce, soy lecithin, most Asian cuisine, soy flour, and soy milk to name a few. Mono-diglycerides and monosodium glutamate may contain soy.
Are there other legumes (beans) that should be avoided?
Legumes include soy, peanut, pea, black eyed peas, and beans such as pinto, white/northern, black, red, kidney, and so on. Some people may be allergic to more than one legume, for example: soy and peanut. Allergists can test for allergies to other legumes if allergic to soy. Consult your allergist to find out if you need to avoid any other food.
If you suspect you have food allergies, see your doctor or allergist for testing and diagnosis. Knowing what foods to avoid and carrying emergency medicine like epinephrine, if needed, can save your life if you have a serious allergy.