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Exploratory study to evaluate the effect of the probiotic strain Lactiplantibacillus plantarum HEAL9 (LPHEAL9) on the gut–brain axis in subjects with moderate stress. One hundred and twenty-nine subjects aged 21–52 years completed the study, randomized to consume either LPHEAL9 (n = 65) or placebo (n = 64) for 12 weeks.
Primary outcome measures:
Determine whether intake of probiotics reduce perceived stress
The authors' conclusion was: Intake of LPHEAL9 significantly improved cognitive functions compared to the placebo, potentially by ameliorating aspects of mood and sleep.
Önning et al. 2023 Nutrients 15(15): 3466
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