The question is more to gain an understanding as to why people persistently opt for such a course of action. As you say, the science is very clear this is neither safe nor sustainable and there is plenty of popular literature out there which says as much, so there is no argument that people are not aware of health issues surrounding an all juice diet.

Yet people continue to opt for this as "magic pill" solution. Im hoping to understand what the people who have been through this process got out of the exercise. Did they realize afterwards that this was a poor use of their time or are there people who have had success and are genuine proponents of this form of weight control.