Pro-ana

Pro-ana is an online subculture that frames anorexia nervosa as a lifestyle choice and shares content encouraging or facilitating disordered eating.

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Eating disorder: A mental disorder involving persistent disturbances in eating behavior that impair health or functioning. Pro-ana content can normalize symptoms that are recognized clinically as eating disorders.
Malnutrition: A state in which nutrient or energy intake is insufficient, excessive, or imbalanced. Prolonged restriction promoted in pro-ana spaces can lead to malnutrition.
Pro-recovery: An online stance or community that supports recovery from an eating disorder. Pro-recovery directly opposes pro-ana's framing of illness as a lifestyle.
Internet research ethics: Ethical principles for studying online activity, communities, and data. Studying pro-ana spaces raises privacy and participant-safety concerns.
Usenet: A distributed discussion system launched in 1980, organized around topical newsgroups. Early internet discussion systems provided a precedent for interest-based online communities.
Anorexia nervosa: An eating disorder marked by restricted energy intake, intense fear of weight gain, and disturbed body image or weight experience. Pro-ana takes its name from anorexia nervosa and often misrepresents the illness as a choice.
Refeeding syndrome: A potentially dangerous shift in fluids and electrolytes that can occur when nutrition is restored after severe undernutrition. Severe restriction can make nutritional rehabilitation medically complex.
Body positivity: A social movement that challenges narrow beauty ideals and promotes acceptance of diverse bodies. It contests the thinness ideal commonly reinforced by pro-ana imagery.
Recommendation system: A software system that predicts and presents content or items a user may engage with. Recommendations may shape whether users encounter pro-ana material after related searches or viewing.
Internet forum: An online discussion platform where users post messages in topic-based sections or threads. Forum structures enabled persistent, peer-to-peer communities around eating and weight.