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They won't find themselves very popular with the rest of the population.
But there are almost four million people in Britain who are unlikely to put on weight because of a 'thinness gene' that curbs their appetite.
Scientists - University - Cambridge - Year - People
Scientists at the University of Cambridge revealed earlier this year that there really are people who are naturally skinny and don't have to watch their weight.
Now they have found a specific gene which they say is the most important in keeping people slender.
Cent - Population - Variations - Gene - Chances
A lucky six per cent of the population have variations in this gene which halve their chances of becoming obese.
These people are about five and a half pounds skinnier on average than someone without the genetic quirk. They are also up to 50 per cent less likely to develop type 2 diabetes and coronary artery disease.
Findings - Drugs - Variations - Switch - Brain
The findings could lead to new drugs which mimic the genetic variations, keeping a switch in the brain which tells us to stop eating turned on.
Professor Sadaf Farooqi, from the University of Cambridge, co-led a study into the MC4R gene, looking at almost half a million British people from the UK Biobank genetic database.
'This - Study - Fact - Genetics - Role
She said: 'This study drives home the fact that genetics plays a major role in why some people are obese, and that some people are fortunate enough to have genes that protect them from obesity.
'It doesn't mean that we can't influence our weight by watching what we eat, but it does mean the odds are stacked against some people and in favour of others.'
MC4R - Gene - Role - Gain - People
The MC4R gene is already notorious for its role in weight gain. About one in 100 people have a mutation which stops the gene working, and...
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