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Probiotics Shown to Improve Mood and Sleep Quality


The gut-brain axis is the biochemical signaling that takes place between the gastrointestinal tract and the central nervous system. Previous research has found that changes in gut bacteria have effects on brain health. Now a new study suggests that supplementation with a mutli-strain probiotic may help improve mood, depressive state, anger, and sleep quality.





Thirty-eight healthy people between the ages of 18 and 35 participated in the study. Half of them took a daily multi-strain probiotic that contained Lactobacillus fermentumL. rhamnosus , L. plantarum, and Bifidobacterium longumfor six weeks. The other half took a placebo. The researchers administered a series of questionnaires at baseline, 3 weeks, 6 weeks, and after a 3-week washout period to assess mood, personality dimensions, and sleep quality.





The researchers found that the probiotic group experienced a significant improvement in mood, with reductions in depressive mood state, anger, and fatigue compared to the placebo group. The probiotic group also showed a significant improvement in sleep quality compared to the placebo group. Participants with the highest quality of sleep exhibited the best mood state.





The study was conducted by researchers from the University of Verona. It was published March 27, 2019 in the journal Frontiers in Psychiatry.


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