A.M.
I don't have an answer, but I really want to thank you for pointing out one of the dilemmas of parenting a child with food allergies and food intolerances. In truth, it is never just abut what we put in their tummies.
We learned a couple weeks ago that there's wheat in my daughter's favorite shampoo. Most shampoos for curly hair seem to contain wheat protein. I never thought to look.
Good luck in your search for an oat-free sunblock!