soybean oil

Yes, in theory, soybean oil should be alright, but occasionally, there are still proteins found in it. My son is allergic, and reacts even with the oil, but it is a much lesser reaction. Just watch yourself. My son is highly allergic so he may be more sensitive to those things. Also, try going to a Whole Foods Market. They are expensive, but they have a lot of specialty items, including soy-free.