A strict ketogenic diet has taken me:
From a near-constant state of brain pain and agitation (ranging from irritability/anxiety to outright psychosis, from suicidal depression to suicidal mania) to ambient calm and peacefulness.
From a near-constant state of severe gut pain to occasional lower levels of pain, and still improving.
From a near-constant obsessive preoccupation with food, calories, diet, body image to conviction that I know what I need to do and can focus on more important things.

How, how, HOW?! (lots to say about this in posts to come)
And--how ironic that food obsession has been cured by what really is a strict diet, given that most eating-disorder treatment focuses on getting patients to give up strict rules. When I explain why/how the ketogenic diet is working, you’ll see the beauty of this: it’s likely that even the anorexia, as destructive as it has undoubtedly been, was a subconscious effort at self-regulation and healing. Nothing has been wasted…

Dear Former Self,

At this point, you would rather die than have a weight in triple digits, and you say so sincerely. You can’t hear how melodramatic that sounds; in fact, from your standpoint at this time death is close enough to lose its melodrama. But at some level, admit it: you must realize that weight gain is on the cards. You’ve gained a couple pounds already because of this ghastly new thing binging and purging, even despite all the brutal fasting you’re doing the rest of the time, your other tricks aren’t working anymore, you know you’re out of control and need help, and, at bottom, you know that your chances of finding a practitioner who would help you lose weight from below 90lbs are approximately zero.