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<p>
<a href="http://www1.imperial.ac.uk/medicine/people/p.froguel/" target="_blank" class="news_link">Philippe Froguel</a> at Imperial College London and colleagues examined DNA and other data collected from over 95,000 people, including some 31,000 children with developmental and intellectual disabilities, 1000 people with schizophrenia or bipolar disease, 3500 people with eating disorders and 59000 healthy controls. They found that 1 in every 2000 people studied had an extra copy of a patch of genes on chromosome 16.
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<p>
Those with the mutation tended to eat less, have a lower body mass index and be lower weight than standard. Men with the mutation were 23 times more likely than usual to be underweight, while women were five times more likely to be underweight.
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Underweight? You may have skinny genes