I hadn’t really considered that juicerexia was a thing (an addiction to juicing), but apparently it is according to Dr. Oz. But since I am pretty comfortable with the general concept of process addictions, I guess juicing can be a problem just like others.
But what I really did like was what psychologist Brenda Wade had to say about addiction on the Oz show (emphasis mine):
An addiction is something that stops your life. It stops your life because you focus all of your time and your energy and your attention on [it].
Unlike some folks who think addiction is being unable to walk through the airport without buying a Cinnabon, I think the concept that addiction is something that really interferes with your life is pretty important.
For me, “something that stops your life” is a pretty good way of saying that.
Weight Maven is written by Beth Mazur. Beth believes that obesity is more symptom than cause and that the real problem is our Western diet -- especially sugar, refined grains, and industrial oils. Beth writes about nutrition, ancestral health, & food policy. And cats! 
Or something that you build your life around? I’ve recently been thinking about fitness ‘enthusiasts’ who make their lives accommodate certain fitness routines rather than fitting it into their lifestyles as unobtrusively as possible. Taking pride in waking up extraordinarily early, before fully rested, to get in a workout, for example.
Similar can be said for certain eating/food avoidance habits. I wonder if there is some hindbrain-based fear mechanism underlying these behaviors. As in, compulsively feeling that one has no alternative but to engage in these behaviors.
The segment on the Dr Oz show was disturbing because the woman who had a juicing addiction/obsession had lost and regained more than 100 pounds several times. I don’t think she even realized the “vicious cycle.”