One of the regulars here did explain how this has a kernel of truth, but of course it is wildly exaggerated. Because anorexia in the earlier stages is essentially a matter of misdirected willpower, the easiest “cure” amounts to mentally breaking the patient and getting them to stuff themselves  with grease and carbs.  In reality though that isn’t used anymore, it never was used on those who got to late stages of anorexia (when a shrunken stomach and failing digestive system make eating very difficult even if they want to), and most of these liars were never anorexic anyway.