Eating disorders ar complicated and might have an effect on anyone.
When Eliza tiny started seriously proscribing her uptake 2 years past, she was referred for specialist facilitate.
Her family had a history of uptake disorders. however she was refused specialist patient mental state treatment as a result of her body mass index (BMI) was too high.
''It created American state desire I wasn't ok at my disorder," she said.
"It created American state desire i might have to be compelled to make a come back at it.''
Which she did. A loved one eventually bought her to possess non-public treatment and he or she was diagnosed with atypical eating disorder - all the symptoms however not the correct weight.
But what's the correct weight?
Prof Tim Kendall, England's most senior mental state authority, says weight should not acquire it.
''If you allow AN disorder till it's ought to the purpose wherever, say with eating disorder, they've lost say a 3rd of their weight, that encompasses a ton of longer-term consequences that create it terribly troublesome to treat, therefore it's wrong in my read to go away this till it's got terribly unhealthy.
"To be told you are not skinny enough - it's nearly AN incitement to urge worse. It's like somebody getting to their medico and being told - you drink one bottle of strong drink every day right now? come once you drink 2.''
Prof Kendall believes patient alternative is vital and community care encompasses a far better probability of success. It ought to ne'er be withdrawn, he says, and hospital treatment ought to be enforced solely within the most extreme cases.
Guidelines from the National Institute for Health and Care Excellence (NICE) state that on its own, BMI is AN unreliable live of AN disorder.
BBC Breakfast asked all sixty two mental state trusts in England and Wales if they used BMI to make your mind up United Nations agency would qualify for patient disorder services.
Of the 44 trusts which responded, one-third said they did.
All said they used it along with other indicators - such as the speed of weight loss. Three trusts, however, said it was a primary measure. They were Derbyshire, Coventry and Kent and Medway.
In some areas, patients might be refused access to services if their BMI was over 14. In others, like Kent and Medway, if it was over 17.5.
Some trusts said they had a minimum threshold under which people might be refused outpatient services.
This is what happened to Claire: ''The first thing they did was weigh me and tell me my BMI was too low.
"I would have to go to hospital. I didn't want to, I'd had a bad experience before and I thought I was making good progress as an outpatient. So I was left to my own devices.
"Everyone's eating-disorder experience is completely different, you can't put everybody in the same box - you have to listen to the person, to how they are feeling."
Sarah Hodge, from Kent and Medway Partnership Trust eating disorder service, said they would rather not use it as a measure at all, but the problem was resources.
''You can have much more success when people have a higher BMI, they're much better able to engage with the therapy. But we just don't have the resources.''
The Department of Health says more funding is on the way: "We are investing £150m to develop community services in every area of the country for children and young people." Eating disorder guidelines from NICE are being redrafted. The hope is some of these concerns will be addressed when new guidelines are published later in the year."
Eliza said: ''You wouldn't tell someone with cancer to come back when their condition had deteriorated, why tell someone with an eating disorder?"
Eating disorders:
Research from the eating disorders charity Beat suggests more than 725,000 people in the UK are affected by an eating disorder.
The National Institute of Health and Care Excellence estimates around 11% of those affected by an eating disorder are male.
The Health and Care Information Centre published figures in February 2014 showing an 8% rise in the number of inpatient hospital admissions in the 12 months to October 2013.
It is estimated that around 40% of people with an eating disorder have bulimia, 10% anorexia, and the rest other conditions, such as binge-eating disorder.
Many eating disorders develop during adolescence, but it is not at all unusual for people to develop eating disorders earlier or later in life.
Source: Beat: Beating eating disorders.
Update 4 August 2016: This story has been amended to remove the Cumbria trust from the list of trusts using BMI as a primary indicator.
Although it told the BBC that BMI was a primary indicator, the trust has since stressed that it is one of a number of criteria used after a diagnosis of anorexia.