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Effects of a gluten-free diet on gut microbiota and immune function in healthy adult human subjects – comment by Jackson

Published online by Cambridge University Press:  14 May 2010

Frank W. Jackson*
Affiliation:
Jackson GI Medical, 1460 Raven Hill Road, Mechanicsburg, PA 17055, USA, email fwj@comcast.net
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Abstract

Type
Letter to the editor
Copyright
Copyright © The Author 2010

A paper in the British Journal of Nutrition by De Palma et al. (Reference De Palma, Nadal and Collado1) noted that healthy adult human subjects fed a gluten-free diet (GFD) developed significant changes in their gut microbiota. Similar results were observed by Collado et al. (Reference Collado, Calabuig and Sanz2) in coeliac-affected infants on a GFD compared with healthy controls. Naturally occurring fructan-type resistant starches, especially oligofructose and inulin, are known to promote a favourable mix of colon bacteria(Reference Gibson3). What has been overlooked in the literature is the extent to which wheat contributes to this prebiotic stimulus. For example, Van Loos et al. (Reference Van Loos, Coussement and De Leenheer4) reported that wheat (78 %) and barley (3 %) together provide 81 % of oligofructose and inulin for average North Americans, with onions giving 10 %. Moshfegh et al. (Reference Moshfegh, Friday and Goldman5) found that, in Americans, wheat supplied 70 % of these two fructans, with onions contributing 25 %. Thus, it appears that a GFD in both coeliac and non-coeliac subjects could produce similar, potentially adverse, changes in the microbiota solely on the basis of a marked reduction in intake of naturally occurring fructans which have prebiotic action. Provision of gluten-free but prebiotic-rich foods and/or a supplement of fructan-type prebiotics could avoid this situation and, in so doing, provide important support to the intestinal microbiota as well as important nutritional guidance for the coeliac patient.

F. W. J. is the president of Jackson GI Medical which markets a prebiotic supplement.

References

1De Palma, G, Nadal, I, Collado, MC, et al. (2009) Effects of a gluten-free diet on gut microbiota and immune function in healthy adult human subjects. Br J Nutr 102, 11541160.CrossRefGoogle ScholarPubMed
2Collado, M, Calabuig, M & Sanz, Y (2007) Differences between the faecal microbiota of coeliac infants and healthy controls. Curr Issues Intest Microbiol 8, 914.Google ScholarPubMed
3Gibson, GR (2008) Prebiotics as gut microflora management tools. J Clin Gastroenterol 42, Suppl. 2, S75S79.CrossRefGoogle ScholarPubMed
4Van Loos, J, Coussement, P, De Leenheer, L, et al. (1995) On the presence of inulin and oligofructose as natural ingredients in the Western diet. Crit Rev Food Sci Nutr 35, 525552.CrossRefGoogle Scholar
5Moshfegh, AJ, Friday, JE, Goldman, JP, et al. (1999) Presence of inulin and oligofructose in the diets of Americans. J Nutr 129, 1407S1411S.CrossRefGoogle ScholarPubMed
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