Citric acid and malic acid in yuzu juice increase mouse intestinal lactic acid bacteria

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  • ユズ果汁中のクエン酸とリンゴ酸がマウス腸内乳酸菌を増やす

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Abstract

To study the effect of yuzu juice on intestinal microbiota in mice, we orally administered yuzu juice to mice and analyzed quantitative changes in lactic acid bacteria (LAB) in their feces. Further, the intestinal regulation effect of LAB was evaluated based on the feces amount.<br> Methods: Yuzu juice group, citric acid group, and malic acid group, which are the main organic acids of yuzu juice, were compared with the control water-administered group. Feces were collected before administration and 1, 2, and 4 weeks after administration, and homogenized with medium. Following supernatant dilution, it was seeded in a LAB selective medium and anaerobically cultured, and the number of LAB colonies was counted.<br> Results: Four weeks after the start of administration, all groups had significantly higher LAB in feces compared with the control group. The effect of yuzu juice was the sum of the effects of citric and malic acids. Additionally, <br>administration of yuzu juice and malic acid showed a tendency for increase in the feces amount.<br> Conclusion: We found that oral ingestion of yuzu juice increased the LAB quantity in the mice intestine and demonstrated that this increase was due to the presence of citric acid and malic acid.

Journal

  • Health sciences

    Health sciences 38 (1), 1-9, 2022

    Japan Socity of Health Sciences

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