Does Probiotic Supplementation Sleep Quality Randomized Trial work?

The current Migaku evidence database contains 2 reusable source documents for Probiotic Supplementation Sleep Quality Randomized Trial. This answer focuses on strength of evidence and what the studies can or cannot prove. - Twenty RCTs were included, of which 15 were assessed as having a low risk of bias and five as having a high risk of bias. [Das M (2026); evidence level 1] - Overall, probiotics were associated with improvements in depression, anxiety, sleep quality, mood, cognition, quality of life, and beneficial gut microbial populations, although findings for cortisol and stress-related outcomes were inconsistent. [Das M (2026); evidence level 1] - Background Probiotic supplementation may influence mental health through the gut-brain axis, with potential effects on depression, anxiety, sleep, cognition, stress hormones, and gut microbial composition. [Das M (2026); evidence level 1] - This systematic review aimed to evaluate the effects of probiotics on psychological, physiological, and gut microbiome-related outcomes across diverse populations. [Das M (2026); evidence level 1] - The microbiota-gut-brain axis suggests probiotics and synbiotics could modulate sleep, but evidence in exercised populations is limited. [Salehi Asl M (2026); evidence level 1] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.