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Dr. Shan Guisinger received her Ph.D. from the University of California, Berkeley and completed postdoctoral work at the Yale University Eating Disorders Clinic.

She has over 30 years experience treating people with eating disorders. Shan has authored theoretical articles on the evolution of anorexia nervosa and interpersonal relations for the prestigious journals, The American Psychologist and Psychological Review. She is writing a treatment manual on anorexia nervosa for American Psychological Association Press.

Dr. Guisinger believes that we must analyze eating disorders and obesity in the context of our evolutionary history and behavioral ecology. Most eating and weight problems today have their roots adaptions to survive famine. The dysfunctional behaviors are mediated primarily by complex biological mechanisms rather than individual choice.

The adapted-to-flee-famine hypothesis (AFFH) proposes that AN is caused by ancient adaptations selected when migration was indeed the best solution to local famine; then individuals high in self-control, energy, optimism and perseverance had a selective advantage, as would their bands. All of the features of anorexia would have facilitated successful migration. Fear of eating kept migrators from being distracted by the occasional berry or bird; restless energy facilitated travel; hallucinating fat stores helped emaciated migrators convince themselves that they could keep moving. Many scouts surely died, but the genes of those individuals and bands that did expand into new rich new land would increase when the population expanded. The pattern of genetic data as humans dispersed around the world is consistent with a long series of genetic bottlenecks and founder events.

For more information: https://www.adaptedtofamine.com/