Well, week 5 ended yesterday, and it was troubling. The shortness of breath I was experiencing intermittently just refused to go away, so....I'm abandoning the VLCD in favor of a milder caloric deficit. I just can't handle 700 kcals a day it seems. The Wife and I went out to dinner, had steak, veg, and a bit of chili (no beans) ...so all very low carb, but higher calories. Sugar is still behaving nicely, and after dinner no shortness of breath. I took a nice long walk and felt great. And I still got some weight loss this AM. So am I off Newcastle? No, but I have to moderate the protocol based on my own needs. I'm switching to 1600 kcals a day, and adding regular food in with the shakes. I actually like the shakes a lot, and so does my Wife. I wonder if maybe the American versions I'm using haven't been giving me the right nutrition like the British Optifast ones do, or is it just that I'm too long in the tooth for such a radical weight loss. Both maybe. Anyway, this should allow modest, slower weight loss with less impact on me. I've already started the process of meal planning; counting every calorie, carb, and protein to make sure I get what I need, and stay around the 54 or less carbs that Optifast has. I've found that after losing 18 pounds I can go up to that number in carbs and keep sugar...I mean glucose nice and low. I will say this, after 5 weeks on Newcastle I've never experienced numbers as good as I have now. Glucose this AM was 5.66 mmol/L. Slightly high normal maybe, but something that won't hurt my health. So I'm sticking with it in my own way.