You might have thought resisting that piece of chocolate cake or extra biscuit was simply a matter of exerting a little will power.

But for some of us it’s much more difficult than that – because of the way our brains are wired.

Scientists have found that a key part of the brain which stops the body from acting on impulse – and gorging – does not function as well in those who are overweight or obese.

A study by scientists from Yale University has shown that falling glucose levels lead to a loss of self-control in the brain which subsequently lead to parts of the brain craving high-calorie food such as cakes, biscuits or crisps.

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