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Brain craves unhealthy foods

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  1. #1
    sumathisrini's Avatar
    sumathisrini is offline Super Moderator Silver Ruler's of Penmai
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    Brain craves unhealthy foods

    Brain craves unhealthy foods when sugar levels fall

    Unable to resist the urge to eat

    When blood glucose levels fall, the brain starts to crave high calorie foods,
    particularly in those who are already overweight, research suggests.
    The craving comes from an area of the brain involved in regulating emotion
    and impulses, and the ability to resist the desire to eat is lost.

    In the study, the researchers manipulated blood sugar levels of obese
    and non-obese volunteers using intravenous infusions.

    Changes in blood sugar levels were monitored while the participants were shown
    pictures of high calorie foods such as burgers, chips, chocolate and ice cream,
    low calorie foods such as broccoli, fruit, salads and bean sprouts,
    and items that were not food.

    As this was happening, the scientists scanned changes in their brains using
    functional magnetic resonance imaging (fMRI).

    When glucose levels fell, two 'reward' areas of the brain - the insula and
    striatum - were activated, inducing a desire to eat.

    But, another area of the brain - the prefrontal cortex - which usually prevents
    impulsive behaviour, appeared to lose the ability to inhibit the urgent 'eat' signals
    being generated in the striatum.

    Researchers said the weakened response was particularly striking in the
    obese volunteers when they were shown pictures of high calorie foods.

    Dr Kathleen Page of Yale University, who co-led the study, said:
    "Our results suggest that obese individuals may have a limited ability to inhibit
    the impulsive drive to eat, especially when glucose levels drop below normal."

    Researchers suggested that maintaining stable glucose levels by eating healthy foods
    such as complex carbohydrates and fruit and vegetables may help people
    maintain a healthy weight.

    The study is published in the Journal of Clinical Investigation.

    Sumathi Srini

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    Last edited by sumathisrini; 28th Sep 2011 at 01:58 PM.

  2. #2
    sudhar's Avatar
    sudhar is offline Commander's of Penmai
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    Apr 2011

    Re: Brain craves unhealthy foods

    nice information...

    In reality there is only Now. If you know how to handle this moment you know how to handle the whole eternity-Jaggi vasudev .




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