Although it may start that way for some, anorexia is not “a diet gone too far.” No consciously chosen diet would take you to the point of organ failure.
In reality, an eating disorder is so much more than that — it’s your brain detecting a stressor (real or perceived) and focusing on escaping from that stressor.
In the process, it deprioritizes all non-essential biological mechanisms to focus on escape, including slowing digestion (reducing appetite in the process) so it can increase absorption of sugars from the digestive tract and give your muscles energy to run away.
Read more on themighty.com