Hello Tryingtocatchup1, It has taken me over 2 weeks to start to lose weight, closer to 3 to be honest and after my original wk1, i'd only lost 1lb. I started wk2 but shifted zilch, lost the plot last Saturday & started again on wk1 this week and FINALLY, the weight is starting to move. As of today I am a total of 6lbs down over 3 weeks; not unreasonable & I am happy with that. However you are not alone in being concerned at the food quantities in weeks 2-3 and then the 3 meals a day thereafter. It's interesting that the founders are now talking 5:2 (which I find virtually impossible, DH is tolerant but I don't want to totally trash my marriage....) which makes me suspect that there is a plateau in the Sirt diet.....
I am also trying to eat in a tighter window, breakfast at 9.30, dinner by 7, this works fine without a social life (!!), but then again, there has to be flexibility with any eating plan, this is after all, meant to be about a food-lifestyle change.
However I picked up & read (virtually finished it) Michael Mosley's 8 week Blood Sugar Diet yesterday & to be honest I think I shall be shifting onto this next week when DH returns from 9 weeks trip to NZ. Why? It is a 4 wk low carb/calorie diet which also tries to re-educate eating patterns away from carbohydrates but has a more generous calorie allowance than the 5:2 diet & the food is very varied. It's also something I believe DH could do, as there's no way with his lifestyle that the juicing would work. Mosley's is a food-plan which looks at preventing diabetes and with the 'state of the nation' I think it should be widely read. Many foodstuffs cross over with the Sirt diet & there is also high weight loss within the 1st month. Red wine is semi-permitted as is 85-95% quality chocolate after the "bedding in period". I will probably work out some form of balancing act between the 2 as this juicing malarky is not a lifestyle choice for me.....but Sirt has introduced me to some tasty nutritious 'diet' food & some devious ideas with buckwheat which i'd never used before, I shall even try savoury buckwheat pancakes on Shrove Tuesday!!