So how do you help prevent food allergies? It's best to start when you're pregnant. Avoiding tobacco smoke during pregnancy, during nursing, and for young children helps decrease allergies in general, including food allergies. On the positive side, eating fish when you're pregnant, nursing, and giving fish to your babies before their first birthday will help reduce food allergies. Probiotics are another great thing. Moms having probiotics in her diet, or when nursing, and again for the babies can help reduce food allergies. All great positive things to do. There's no food that's been proven to help by avoiding it for a pregnant or nursing mom, but I suggest avoiding GMO ingredients in your food during pregnancy, nursing, and the baby's first year of life when the immune system is being set. These new foods with new proteins added in them came about the same time that food allergies began to increase, and at least animal studies is suggestive enough that I'm concerned it may be contributing to the rapid rise in food allergies.