London, Feb 24 : Pro-anorexia sites, such as Facebook and MySpace, which encourage teenage girls to compete to lose weight and provide tips on fasting, should be tackled by the British government, say campaigners.

Medical experts are afraid that the growing numbers of teenagers in Britain are being ‘sucked’ into a culture dominated by websites that promote anorexia and bulimia as a ‘lifestyle choice’.

Although Internet providers can shut down the sites, new ones appear as quickly in their place.