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Experts have also warned the filter could fuel a "toxic diet culture" online and potentially contribute to eating disorders.

"During my eating disorder I exercised for all the wrong reasons... to be the smallest possible version of myself", said Tia.

Dr Montgomery said some of these people were "very vulnerable", including one patient with a long history of eating disorders where he had to intervene because the medication was not safe.

Some in the healthcare industry have concerns about the wrong people getting hold of the jabs - including those who are already a healthy weight or have a history of eating disorders.

“Especially a woman who has been so open about being in recovery from an eating disorder. I’m not upset for myself but for anyone easily influenced by the diet culture.”