Orthorexia is actually a real ED.  It's not just an obsession with healthy, but an obsession with eating things that one considers healthy.  i.e. safe foods.  A lot of orthoretics are very restricted. However, the fat in that article was probably just eating a normal, healthy diet, which she self-diagnosed as orthorexia so she could give herself a pass to inhale large volumes of junk food in order to "cure" her disease.