Teenage girls are becoming involved in dangerous games of competitive dieting thanks to the proliferation of pro-anorexia websites.
Between 400 and 500 websites promoting anorexia and related eating disorders, which are visited by thousands of young girls each day, have been identified in the first review to quantify the phenomenon.
They tell people how to stay thin, promoting diets of 400-500 calories a day (compared with a recommended 2,000 for women and 2,500 for men), backed by coffee, cigarettes and diet pills. They encourage "starving for perfection", featuring pictures of celebrities such as Keira Knightley and Victoria Beckham, and advocate "thinspiration" backed by images of thin bodies.
In one year, more than 500,000 people visited the sites, according to one study, and a 2011 EU survey found that more than one in five six to 11-year-olds had been exposed to one or more sites with "harmful content".
Dr Emma Bond, senior lecturer in childhood and youth studies at the University Campus Suffolk, who carried out the review, said the sites were set up by individuals with eating disorders.
"It starts with an individual who wants to share their experience and as they get a following they set themselves up as almost goddess-like," she said.
"I came across a website set up by a girl who was disgusted with herself because she had put on a few pounds at Christmas. She planned to fast for three days and regain control. In under two hours, she had 36 followers saying things like, 'You're wonderful, you're an inspiration to me'."
A disturbing feature is the rivalry that can occur between "ana-buddies" who meet on the websites and vie with each other to starve themselves to the point where their lives may be in danger.
Dr Bond said the threat posed by the sites should be tackled through a combination of education and better policing. "Eating disorders are not going away – if anything they are becoming more common," she said. (© Independent News Service)