I've tried it - first time when I was 20 (22 years ago) as I didn't want to be 21 and fat. They hypnotised me to believe I was allergic to bread, potatoes, cheese, flour, sweets, chocolate .. and a few other things I can't remember ...
Apart from appearing to be more mental than I already was walking into the office saying all of a sudden I was "allergic" to sandwiches etc., it did nothing for me at all.
That didn't put me off and I went again to another hypnotherapist. Apparently he was one of the best. And expensive too - but after around 15 weekly sessions I decided I was being ripped off and stopped going.
Tried one more time after that but again no good.
Must have spent enough to buy a 5 bedroom house in the heart of London (well, slight exaggeration, but you get my drift!) and the only thing to work with me was LL.
Saying that, I've put some back on, but I'm still 70% lighter than I was
My advice .. don't waste your money.
Mandana x