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. 2023 Jan 31;13:1729. doi: 10.1038/s41598-023-28764-0

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Forest plot of studies investigating the effect of anthocyanin supplementation on the SCFA profile, sub-grouped by short chain fatty acid type. Pooled effect estimates are shown by diamonds after removing highly influencing studies. Values are standardized mean differences with 95% CIs determined with the use of random-effects models. Heterogeneity was quantified by I², inverse variance and standardised mean difference [SMD].