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New research that people's genes are key to helping them slim. A study from Cambridge University in the U.K. that thin people had DNA that variants which helped them stay slim and fewer variants linked to overweight. Researcher Sadaf Farooqi, professor of metabolism and medicine, said: "We've found that there are genes with thinness." She added: "Genes at least 40 per cent of a role in people's weight. It's much more than people ." This might help explain why some people are naturally skinny while others have big problems with their weight down and seem to on the pounds so easily.

The study is in the journal PLOS Genetics. The researchers said they the study to find out why so many people struggle with their weight. Over 30 per cent of American adults obese, while a staggering 94.5 per cent of adults on the South Pacific island of Nauru are overweight. Professor Farooqi said she wanted to help people who are with their weight. She said: "It's easy to to judgment and people for their weight, but the science that things are far more complex." She : "Healthy, thin people are generally thin because they have a lower burden of genes that a person's chances of overweight and not because they are morally superior."

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