and is sometimes used interchangeably with pro-ana.

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Conversely, reverse thinspiration features images of fatty food or overweight people intended to induce disgust.

There exists significant controversy between supporters and opponents of thinspiration; some assert that thinspiration only "glorifies" eating disorders pro-ana blogs often post thinspirational entries, and many pro-ana forums have threads dedicated to sharing thinspiration.

Finally, behaviors first learned after visiting a pro-ana site include using thinspiration (63%), hiding eating disorder behaviors (60%), fasting (57%), using diuretics and laxatives (45%), vomiting (23%), using alcohol or other drugs to inhibit appetite (22%), and self-harm (22%).

In October 2001, The Oprah Winfrey Show hosted a special on anorexia; the pro-ana movement was discussed briefly by the guest panel, who expressed alarm at the appearance of pro-ana websites and recommended the use of filtering software to bar access to them.

The photographs were intended as a mocking and satirical take on pro-ana.

To Thein's dismay, however, many images from the exhibition were nevertheless later shared online as thinspiration.

In another 2009 survey, by parental control software vendor Cyber Sentinel of 1500 female Internet users aged 6–15, one in three reported having searched online for dieting tips, while one in five reported having corresponded with others on social networking sites or in chat rooms for tips on dieting.

Visitors to pro-ana web sites also include a significant number of those already diagnosed with eating disorders: a 2006 survey of eating disorder patients at Stanford Medical School found that 35.5% had visited pro-ana web sites; of those, 96.0% learned new weight loss or purging methods from such sites (while 46.4% of viewers of pro-recovery sites learned new techniques).

A 2012 report by Deloitte Access Economics, commissioned by Australian non-profit The Butterfly Foundation, estimated that eating disorders resulted in productivity losses totaling just over $AUD15 billion, with 1828 (515 males and 1313 females) dying that year from eating disorder-related complications.

Unlike pro-ana sites, pro-recovery sites are designed to encourage development and maintenance of healthy behaviors and cognitions.

or boasting about personal accomplishments of weight loss.