Like I said, and the science says it is not sustainable- are we arguing in circles?
If it is effective, and it is, why construe that as a fad? ‘Temporary weight loss for Obese people.’
How it is currently being used by the general public and touted as being able to deliver is the fad...the science of what it is effective for short term weight loss remains.
The problem is (like always) when people latch onto it as magic that will somehow achieve quick results that will sustain their long term goals. That is what defines a “Fad Diet”.