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. 2021 Nov 29;8:756243. doi: 10.3389/fnut.2021.756243

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Copyright © 2021 Niu, Bao, Gao, Ru, Li, Jiang, Ye, Wang and Wu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Supplementary effect of NMN on dominant fecal bacteria in pre-aging mice. (A) Phylum level, (B) genus level, and (C) venn diagram. *Indicates significant difference at p < 0.05 level.