Typically advice seems (for the non-medical professional) to state recommended dietary fibre in absolute mass.

I wonder if it is more accurate to state recommended dietary fibre in terms of the quantity of food being eaten? Perhaps as a percentage of the mass?

The reasoning behind this is simply that dietary fibre seems less to do with obtaining nutrients, but more to do with the physical consistency of food / bolus / chyme.

Recommendations for dietary fiber intake are usually based on age/calorie intake:

The Dietary Guidelines for Americans 2015-2020 (p.97) recommendation for men age 19-30 (2,400 - 3,000 Cal range) is 33.6 g and for girls age 4-8 (1,200 Cal) is 16.8 g of fiber per day.

According to Food and Drug Administration, the "daily value" for dietary fiber in a 2,000 Cal diet is 25 g.

It may be more important to think about the soluble/insoluble fiber ratio: Most metabolic health effects suggested so far are associated with soluble fiber and bowel regularity with insoluble fiber.

  • Please note that the above references are US centric. Other countries have varied recommendations. – JohnP Nov 8 at 17:24
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    I was not trying to emphasize the exact amounts but on what are recommendations based on and what do you want to achieve with fiber consumption. The recommendation from European Science Hub is 25-38 g fiber/day for adults, so not really different from the US. – Jan Nov 8 at 17:33
  • It wasn't a criticism, just a note for future browsers. :) They are fairly similar for most countries that I've looked at. – JohnP Nov 8 at 18:20

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