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Why Some People Can’t Turn Down Sweets

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Bradley Liss
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Although most people tend to go for fewer sweet things as they get older, if you re obese, your brain s reward system operates in a different way.

In general, people grow less fond of sweet things as they move from adolescence into adulthood.

The study volunteers were 20 to 40 years old.

The researchers then conducted positron emission tomography PET scans to identify dopamine receptors linked to rewards in each person s brain.

Pepino and Hershey explained that it s possible that insulin resistance or some other metabolic change linked to obesity could contribute to the absence of those associations in the obese group.

What s clear is that extra body fat can exert effects not only in how we metabolise food but how our brains perceive rewards when we eat that food, particularly when it s something sweet.

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Bradley Liss
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