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Scientists have discovered that fructose, a 
 occurring sugar, is a major 
 of obesity. Fructose is also known as "fruit sugar". It occurs to varying 
 in fruit and vegetables. It is also used in processed 
 in high fructose corn syrup, which is in a 
 of the food we eat, and promotes obesity. A study led by Dr Richard Johnson at the University of Colorado found that although fructose isn't the biggest 
 of calorific intake, it stimulates an urge to eat 
 food. Researchers posited a shift of 
 on what we eat. They wrote: "All hypotheses recognize the 
 of reducing 'junk' foods, [however] it remains unclear whether the focus should be on reducing [fructose] 
."