The jury is not out -- it's an unconfirmed hunch that, as the study you link notes, risks harming patients who are having trouble keeping down food as it is.
This is just keto and fasting fans pushing their obsession on cancer patients. Same for marijuanauts -- anti-nausea drugs have long outperformed cannibinoids but you still have stoner friends offering you spliffs (ok, save them for later)
