There are many people that have strange reactions to foods. So I totally believe that someone (falsely) diagnosed with BP can be cured after changing their diet. They may have had all the symptoms of BP but it can be completely diet, mineral and vitamin related.

I have seen for myself ADHD and autistic children cured by a change in their diet. Now I dont believe they ever actually had a mental health issue in the first place it was all diet related, but the amount of people that do not know they have dietary issues is phenomenal. I'd recommend anyone with any sort of mental health diagnosis to first have a go at changing their diet to see if that helps their symptoms. You'd be surprised a the amount of people wrongly diagnosed and put on mind altering medications when all they needed was a simple diet change. Of course not true for everyone but it certainly is for some.