**Anorexia decoded**
Looking at anorexia through a biological lens, _Decoding Anorexia_ illuminates the evolutionary, neurochemical, physiological, and psychological factors underlying the darkness of this disorder.
From the outside, anorexia seems to go against our natural human drives. After all, how could an ability to ignore hunger, increase activity, and buy into severe body image distortions be adaptive? The book presents a fascinating new theory—called the Adapted to Flee Famine response (or Migration Theory)—which proposes that these anorexic traits could have had evolutionary value during Pleistocene times of famine:
“The starving person needs to be unable to recognize their own emaciation, [otherwise] they may be shocked out their food denial and hyperactivity. This could put countless Pleistocene people in danger if hunter-gatherer groups didn’t have at least one person able to ignore the starvation and search for food. Thus, far from being rather bizarre and crazy-making, the profound body image distortion and an inability to recognize that there’s anything wrong are actually helpful, if you view anorexia from the point of view of the Pleistocene.” (p. 104)
This Adapted to Flee Famine response also helps to explain why the recovery process for anorexia can be so relentless:
“Females who go on to develop anorexia generally weigh less than their [peers], even before illness onset. If inadequate amounts of body fat trigger the Adapted to Flee Famine response, then this leanness loads the gun with even more ammunition. Combine this with the perfectionistic temperament, and you end up with someone with the psychological endurance to withstand deprivation and very little buffer between their normal weight and the havoc of starvation…Once this weight loss starts, the [anorexic] body essentially panics…It can take weeks or even months for the body to escape from ‘panic mode.’ Thus, even after an individual regains physical health, the biological drive to restrict food and over-exercise remains.” (pp. 106-107)
In addition to exploring this evolutionary explanation for anorexia, the book also unravels how anorexia results from a complex interaction between malfunctioning hunger signals, disrupted hormone levels, anxiety, depression, difficulties with decision-making, as well as predisposed personality traits including perfectionism, inflexibility, rule-boundedness, excessive doubt and cautiousness, and an intense drive for order and symmetry.
A trained scientist and freelance science writer, the author does an exceptional job in translating scores of academic research papers and interviews into concepts and explanations that are easily digestible. As someone who has personally suffered under the grips of anorexia, she chooses words that are often quite powerful in decoding the complexities of anorexia. Sample for yourself:
“When you have too much on your plate metaphorically, you make sure you have too little on your plate literally…Anorexia nervosa is about making everything small again and reducing the complexity of everything.” (p 66)
“The behaviors are the tip of the iceberg. They’re the ten percent of the iceberg that’s out of the water, and that’s what everyone sees. But that’s only a tiny fragment of the condition. Most of what anorexia is sits below the surface of the water. It’s the cognitions, the perfectionism, the anxiety. It’s the depression, the alterations in hunger cues and appetite, and the interoceptive difficulties. It’s also why weight gain alone isn’t enough to treat anorexia. To recover you have to melt the whole iceberg.” (p. 141)
“Full recovery is a hard, complicated task. It’s not just about the absence of things, but about the presence of things. It’s not just the absence of the obsessive thoughts about food and weight, but the presence of a great variety of things that come from being in the moment.” (p. 166)
I highly recommend this book to anyone who wants to better understand the enigma of anorexia. _Decoding Anorexia_ definitely lives up to its name.