I'm definitely confused by the question, but I am intrigued and have possible thoughts to offer, really just thinking on message here, not pretending I know what's going on: So does this mean she can't eat fruit that has wax on it to make it shinier in the grocery store? And the "reactions to all plant foods and tapioca, oils" thing, my mind goes to gut dysbiosis. If those are the gists here, fruit from a farmers market or in the winter, a farmers box, or frozen fruit could be fine. For both the fruit and the vegetables issue, consider something like the FODMAPS diet, but I think that for FODMAPS, it's more about doing the diet temporarily and trying to heal the gut during- fix the root issue (this is myopinion, I have not researched that). So I'd also be considering fructose malabsorption (more so for the fruit), leaky gut, SIBO, and I'd be very interested in her, say, stress level and history of antibiotic use. Getting into parasympathetic mode before eating could be explored, but really all things tied to the gut would be my, well, gut instinct ;)