Dukan dieters....question about milk

tashdownunder

So I know you can have non-fat milk while doing Dukan. In the book he refers to having milk in your tea and coffee and using it to make sauces and desserts. But what about in a smoothie/milkshake? I was thinking of making a smoothie breakfast, with non-fat milk, vanilla essence, and a bit of yogurt. But would that be too much milk? It doesn't sound like the kind of use of milk that Dukan had in mind....