Your body is lazy by nature. If you give it the choice between rapid energy (marmalade, fruits, smoothies etc…) or slow energy (bread, cheese…), what do you think it is going to use first???
It will use the energy that is faster to digest and assimilate and store the slow energy….maybe in your bum…
So NO SUGAR IN THE MORNING and certainly NO MIX OF SUGAR AND CHEESE!!!!!
By the way, croissant is a bomb which mixes fat and sugar…
Sorry for the fruit juice lovers….
My Chrono Diet 
this is not a traditional french breakfast, wo don’t go every morning to the boulangerie to by croissants XD, it’s only on special occasion like holidays… the traditional breakfast is coffee or coco with break (generally brown bread) with marmelade or butter and fruits. cereales nowadays too. and no cheese on breakfast!