As Joanne says, don't cheat, because the first cheat is the easiest to avoid.
But -
If you must cheat -
Cheat with fat rather than carbs.
Because fat will make you gain weight, but carbs will a.) stop the diet from working and b.) stimulate your appetite and make it harder to stop dipping into the cheat food.
So
If you must cheat...
Pork, cheese, butter, nuts
NOT
cakes, ryvita, chocolate....
OR
BETTER STILL
Work out what you are craving and find the DUKAN equivalent.
is there a dukan equivalent to red wine? lol
I totally admire all of you who can stick to the plan. I've got much worse over the last 3 weeks, up til then this has been the best way for me to lose weight - never got hungry, still enjoyed my meals and have fitted it into my life & family well. And it's worked, brilliantly. I'd never have believed it possible. But these dark mornings, dark evenings, and me getting bored are playing havoc with my will power - and I can resist everything but temptation.
Probably it is time to move on. Better read the next chapter in the book then