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    Lean people ate 10% more calories or 100 more calories when the portion size was doubled


    Posted by .(JavaScript must be enabled to view this email address)
    Wednesday, January 26, 2011 3:25 pm Email this article
    Lean people ate roughly 10% more calories or 100 more calories when the portion size of pasta they were given was doubled, however, the difference was not statistically significant according to a study from the University of Colorado in Denver, Colorado, USA.

    This compares to an increase of 40% or 339 calories in overweight people.
    Calorie Intake

    Calorie intake: 970 calories with small portion vs 1070 calories with large portion

    The calorie intake increased from roughly 900 calories with the overweight subjects were given the smaller portion compared to roughly 1240 calories when they were given the larger portion.

    (I say “roughly” because I this is based on a graph in the paper. Unfortunately, they do not list the exact calorie intake for each situation in the text of the paper.)

     

    Potion Sizes

    Portion sizes: 1255 calories vs 2509 calories

    The small portion was 410 grams containing 1,255 calories, while the large portion was 820 grams containing 2,509 calories.

     

    Other Foods Offered

    Other foods offered: carrots and apples

    “In addition to the entrée, complementary foods were offered with each meal including fixed portions of baby carrots (100 grams, 35 calories), sliced apples (130 grams, 68 calories) and water (800 grams).”

     

    Subjects

    Subjects: 8 men and 6 women

    The study involved 8 men and 6 women with an average age of 37-years-old.

    REFERENCE

    Burger K, Fisher J, Johnson S. Mechanisms behind the portion size effect: Visibility and bite size. Obesity (Silver Spring). 2010 Oct 14, published on-line.

    AUTHOR’S CONTACT INFORMATION

    Susan L. Johnson
    Department of Pediatrics
    Section of Nutrition
    University of Colorado
    Denver, Colorado, USA
    .(JavaScript must be enabled to view this email address)

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