The diet site recommends that you have diet products like shakes and bars to be sure of the
exact calories you eat on down days for the first 2 weeks (induction stage) but to be honest I think this is a bit overkill! I just counted calories so things like tins of soup and fresh fruit is fine. After the 2 weeks ur "allowed" to eat "normal" food on down days but I reckon u should do this from the start anyway lol The 2 week induction is meant to switch on a metabolism fat-burning gene or something, that's why they try to be strict on calories but as long as ur sensible it doesnt really matter what u eat. On my very first down day I ate 2 bites of a doughnut, a tin of soup and 3 rich tea biscuits lol Like I said though, its better to eat healthy stuff as it fills u up for longer.
As for normal weekly loss I'm not sure and all the threads on here have been dead for ages! So there's no 1 to ask but me and MsJMC have been giving JUDDD a go together
But in theory, there's 3500 calories in a pound of fat, so u need to burn 3500 more calories than u eat to lose a pound........ sooooooo
If, during a week u have down days on Mon, Weds, Fri and Sunday, there is a 8000 calorie deficit (as you eat 2000 more calories on up days). So, eating 8000 calories less than normal (based on a 2500cals a day diet) would mean u lose a minimum of 2lbs, but I think it's more likely to be 3-4 depending on how big u are to start with. Ah I forgot how much I hated maths

I think this is right but don't quote me!
Another thing to note is that you shouldn't run 2 down days together, as the bodies "starvation" gene kicks in after 48hours so will hold on to all ur fat if it thinks it wont get fed much. Plus, knowing an up day is never more than 24hrs away is really good - cuz u know u can have something youve got ur eye on eventually

Because of this though, when an up day does come around, ur craving has normally passed so u dont want to eat the naughty thing u wanted in the first place