Dukan Dieters?

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Is non-fat frozen yogurt allowed on the plan? I had some and I guess its a little too late to be concerned but I am curious. If that's the case I slipped up and need help, what should I do from here. I was in the Cruise phase, on day 7. According to the website I should have been in that phase for 17 days, therefore I only had 10 more days left before Consolidation.