Understand that it's a quick way to lose weight....nothing wrong with that....issue is how do they keep it off after the diet?
There's a lot of dieticians who would disagree with that 100% and say that quick weight loss leads to yoyo dieting. As you say though, the issue is keeping the weight off because it's obvious that a return to old habits is a return to your old weight.
Whatever somebody was eating before something like the Newcastle diet was helping them to maintain their old weight, returning to their old diet would eventually help them gain weight again.
I haven't mentioned a calorie once. LOL
I've not tried the Newcastle diet yet and in the 8 years that I've taken diet and nutrition seriously I lost 4 stone when I stopped taking rosiglitazone (no change in diet or exercise required), I didn't then lose the next 3 stone until I cut back on carbs to about 80 grams a day and the next 1 1/2 stone didn't go until I had to take diclofenac and flucloxacillin after a Total Knee Replacement last November (no further dietary change required).
The weight loss stopped at the same time as the drugs stopped and the theory is that the slowing down of my intestinal tract transit time means I am absorbing more nutrients than when the two drugs were causing faster intestinal transit time.
Any experts on the Krebs cycle and ATP production out there?
Dieting and losing weight can be a bit like rocket science, it's certainly more than cutting calories. It's why my major worry that while the NHS like to say the type II is life style related, there's a lot of people who do all the right things and still gain weight and still become diabetic. Just my opinion.