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    Protein provides 3.2 calories per gram, not 4 calories per gram


    Posted by .(JavaScript must be enabled to view this email address)
    Saturday, February 24, 2007 1:34 am Email this article
    How long have you heard that protein and carbohydrates provide 4 calories per gram of food, and fat provides 9 calories per gram? Probably forever. But these numbers are bogus according to a recent paper by Dr. Geoffrey Livesey. Proper calculation

    Calculate calores after subtracting the calories required for metabolism and storage

    The calorie content of food should represent the amount of calories left for your body to use after subtracting the calories required for metabolism and storage.

    It is called Net Metabolisable Energy.

     

    Protein

    Protein : 3.2 calories per gram

    After subtracting the calories required for metabolism and storage, protein contains 3.2 calories per gram, not 4 calories as we have always been told.

     

    Fat

    Fat : 8.7 calories per gram

    After subtracting the calories required for metabolism and storage, fat contains 8.7 calories per gram, not 9 calories as we have always been told.

     

    Carbohydrates

    Carbohydrates : 3.8 calories per gram

    After subtracting the calories required for metabolism and storage, carbohydrates contains 3.8 calories per gram, which is what we have always been told.

     

    Alcohol

    Alcohol : 6.3 calories per gram

    After subtracting the calories required for metabolism and storage, alcohol contains 6.3 calories per gram, not 7 calories as we have always been told.

     

    Fiber

    Fermentable fiber : 1.9 calories per gram

    After subtracting the calories required for metabolism and storage, fermentable fiber contains 1.9 calories per gram, not 0 calories as we have always been told.

    List of fermentable fibers

    A list of some soluble (fermentable) fibers include:

    REFERENCE

    Livesey G. A perspective on food energy standards for nutrition labelling. Br J Nutr. 2001 Mar, 85(3):271-87.

    AUTHOR’S CONTACT INFORMATION

    Dr. Geoffrey Livesey
    Independent Nutrition Logic
    Pealerswell House
    Wymondham, Norfolk, NR18 0QX, UK
    fax +44 1953 600218
    .(JavaScript must be enabled to view this email address)

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