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The effects of dairy and dairy derivatives on the gut microbiota: a systematic literature review

journal contribution
posted on 01.12.2020, 00:08 by H Aslam, Wolfgang Marx, T Rocks, A Loughman, V Chandrasekaran, A Ruusunen, SL Dawson, M West, E Mullarkey, JA Pasco, FN Jacka
© 2020 The Author(s). Published with license by Taylor & Francis Group, LLC. The effects of dairy and dairy-derived products on the human gut microbiota remains understudied. A systematic literature search was conducted using Medline, CINAHL, Embase, Scopus, and PubMed databases with the aim of collating evidence on the intakes of all types of dairy and their effects on the gut microbiota in adults. Risk of bias was assessed using the Cochrane risk-of-bias tool.The search resulted in 6,592 studies, of which eight randomized controlled trials (RCTs) met pre-determined eligibility criteria for inclusion, consisting of a total of 468 participants. Seven studies assessed the effect of type of dairy (milk, yogurt, and kefir) and dairy derivatives (whey and casein) on the gut microbiota, and one study assessed the effect of the quantity of dairy (high dairy vs low dairy). Three studies showed that dairy types consumed (milk, yogurt, and kefir) increased the abundance of beneficial genera Lactobacillus and Bifidobacterium. One study showed that yogurt reduced the abundance of Bacteroides fragilis, a pathogenic strain. Whey and casein isolates and the quantity of dairy consumed did not prompt changes to the gut microbiota composition. All but one study reported no changes to bacterial diversity in response to dairy interventions and one study reported reduction in bacterial diversity in response to milk intake.In conclusion, the results of this review suggest that dairy products such as milk, yogurt, and kefir may modulate the gut microbiota composition in favor to the host. However, the broader health implications of these findings remain unclear and warrant further studies.

Funding

This review was not specifically funded. HA, AL, TR, WM, MW and FNJ are supported by various forms of funding and/or scholarships.

History

School

  • School of Allied Health

Publication Date

09/11/2020

Journal

Gut Microbes

Volume

12

Issue

1

Article Number

e1799533

Pagination

19p. (p. 1-19)

Publisher

Taylor and Francis

ISSN

1949-0976

Rights Statement

The Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.

Licence

Exports