I'm sure that this question has been asked before, but I've been unable to find the correct wording to give useful search results.

Nutritional information assumes the following energy values: 4kcal/g carbohydrates), 9kcal/g fat etc.

How much variation is there between individuals in the energy that is absorbed from food. I'm looking for quantitative data (e.g. with st. dev and error bars), such as good PubMed studies.

  • For what purpose do you need these data?
    – Jan
    May 10, 2018 at 6:58
  • For personal interest, tracking.
    – Laurens
    May 11, 2018 at 7:37
  • en.wikipedia.org/wiki/Atwater_system this link would not be the answer to your question but could point you out the right way.
    – mattia.b89
    Oct 28, 2018 at 13:09


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