Might give you some clues? There’s a big chunk in the middle where somebody’s explaining how the stress caused might well outway the benefits.
My observation is that migraine diets are pretty much obligatory in The US and, apart from a very few specialists, pretty much unheard of or not bothered with in the UK. The migraine specialust neuro I saw said not to bother as it would make no difference. However it’s many years since I touched chocolate, red wine or citrus fruit. And I have a good reason for that. Quitting caffeine is a pretty general and sensible suggestion as is avoiding MSG, easier typed than activated. Dr Hain from memory suggests very similar restrictions but far from a migraine diet. I take my hat off to anyone who can stick with one for long. Personally I find it virtually impossible. I am always reassured by various figures I have seen quoted that they only help a very very small percentage of people.