It's not easy. She's allergic to all nuts, including peanuts and you can't even imagine how many things that are not safe are not labeled. I have to contact the manufacturer of pretty much every food, lotion, shampoo, soap, etc that we use. We have to be careful about potting soil (all Scott's products may contain nut shells) and there are products like green beans, mac & cheese, even generic kool aid mix that have nut cross-contamination.
I have to admit when I read about nut shells in pincushions last year I just about lost it.