I agree with @kitedoc. The ND may well have some success but the LCHF diet will be even better. The ND is focussed around calories when we need a diet focussed around lower carbs. The ND assumes all calories when you 'eat' them are the same (they aren't) and Newcastle University doesn't seem to understand that? The ND was started as a 6 week or so diet before bariatric surgery and may well help those patients. The LHCF diet needs to be for life for us so why not start it now?