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High dietary intake of prebiotic inulin-type fructans in the prehistoric Chihuahuan Desert

  • Jeff D. Leach (a1) and Kristin D. Sobolik (a2)
Abstract

Archaeological evidence from dry cave deposits in the northern Chihuahuan Desert reveal intensive utilisation of desert plants that store prebiotic inulin-type fructans as the primary carbohydrate. In this semi-arid region limited rainfall and poor soil conditions prevented the adoption of agriculture and thus provides a unique glimpse into a pure hunter–forager economy spanning over 10 000 years. Ancient cooking features, stable carbon isotope analysis of human skeletons, and well-preserved coprolites and macrobotanical remains reveal a plant-based diet that included a dietary intake of about 135 g prebiotic inulin-type fructans per d by the average adult male hunter–forager. These data reveal that man is well adapted to daily intakes of prebiotics well above those currently consumed in the modern diet.

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Corresponding author
*Corresponding author: Dr Jeff D. Leach, fax +1 504 373 5213, email jeff@paleobioticslab.com
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British Journal of Nutrition
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