I have done a fat fast, but do know that I am not in induction and have worked thru all the rungs of OWL. The reason I have done them is while I do lose, I do so very slowly and can sometimes go weeks w/o a loss. I have to say-I did not do the Atkins one of cream cheese and macadamia nuts (I think), but one where fat was 75-80 % of my days food and carbs were below 3%. Worked very well-did for 3 days lost 3 lbs and the weight stayed off (vs water weight). Again-I am not sure this is appropriate for induction afer a week long stall.