I'm afraid going private or not, won't make any difference. Learning what you can and cannot tolerate is trial and error. And what one person eats fine, the next person has pain eating. Like me and broccoli; my favourite vegetable. It's not a usual problem food, but I can't eat it.
My surgeon told me I have 16 months post op to learn what I can and cannot eat; anything I still can't eat after that, I'm stuck with never being able to tolerate. Oh well, just over a quarter of the way to that 16 month deadline! There's still hope for me and broccoli!