lajlaj the vegs thing is part of the reason I've switched from dukan to a more atkinsesq low carb plan.
Being able to have roasted brocoli and cauli with a drizzle of oil(and no guilt) has made my week
That said I did manage on dukan for a long time and lost ALOT.
With preparation and work it is do-able.
Do you like raw veggies? Jo makes ratatouille which is a good option as you can make a batch and freeze.
I liked the muffins but also had bran in yog when couldnt be bother to whisk eggs, or I had it in meatloaf or on fish. Its pretty well disguised that way.
What is your calorie intake like? Its very easy to slip into a very low calorie plan on this without really noticing, which can lead to the tiredness. Also are you taking your vitamins?
I fell to this often, its like you dont eat because your stomach isnt telling you its hungry, but your brain is and its not letting you know.
Oh and this diet helps break the snacking habit, its really good at that, and whilst it can be a bit sad to let go of the habit, you are building a stronger healthier you. Not reaching for the sugar free sweets and biscuits will help you not reach for the sweets and biscuits once at goal.