I hadn't thought of CBT, it does work in a very loose sense of the term although I wouldn't call weight loss of 4 kg that plateaus after a few months much of a success. I maintain that no non-surigcal intervention (that I know of) results in significant long term weight loss. I would be very excited to hear about one that does.
I would bet that there are no one time interventions that don't have a regression to pre-treatment levels (except surgery).
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