Effect of Bifidobacterium longum on cognition and microbiota in post-stroke patients: a single-blinded, controlled trial.
- 2026-02-11
- International journal of medical sciences 23(3)
- PubMed: 41799757
- DOI: 10.7150/ijms.124024
Study Design
- Type
- Randomized Controlled Trial (RCT)
- Sample size
- n = 22
- Population
- 22 post-stroke patients
- Methods
- Single-blinded, randomized, placebo-controlled trial; participants received either placebo (n = 10) or 2 × 10^10 colony-forming units (CFU) of Bifidobacterium longum OLP-01 powder (OLP-01 group, n = 12) daily for 12 weeks
Stroke is the major leading cause of death globally, and has a high disability rate. Malnutrition, cognitive dysfunction, motor impairment, and gut dysbiosis are observed in stroke patients. Our study explored the effects of Bifidobacterium longum OLP-01, a probiotic from an Olympics gold medalist, on cognitive function and gut microbiota as the primary outcomes, and on nutritional status and physical performance as the secondary outcomes in post-stroke patients. The study was a single-blinded, randomized, placebo-controlled trial. We recruited 22 post-stroke patients. Participants received either placebo (placebo group, n = 10) or 2 × 1010 colony-forming units (CFU) of Bifidobacterium longum OLP-01 powder (OLP-01 group, n = 12) daily for 12 weeks. Nutritional status was assessed using Mini Nutritional Assessment (MNA). Cognitive function was evaluated by Montreal Cognitive Assessment (MoCA), Trail-Making Tests, and Stroop Color Naming Test. Physical performance was measured using Timed Up and Go Test and 6-Minute Walk Test. Blood and stool samples were collected for biochemical and gut microbiota analyses. The OLP-01 group increased MoCA scores, decreased time to completion of Trail-Making Tests, and had greater accuracy on incongruent in Stroop Color Naming Test, but decreased MNA scores within the normal ranges. The cognitive-related gut microbiota strain showed differences between the two groups. Supplementation of Bifidobacterium longum OLP-01 at a dose of 2 × 1010 CFU daily for 12 weeks improved cognitive function and changes gut microbiota, but did not alter physical performance in post-stroke patients.
Research Insights
| Supplement | Dose | Health Outcome | Effect Type | Effect Size | Source |
|---|---|---|---|---|---|
| Bifidobacterium longum | — | Improved Cognitive Function | Beneficial | Moderate | View sourceThe OLP-01 group increased MoCA scores, decreased time to completion of Trail-Making Tests, and had greater accuracy on incongruent in Stroop Color Naming Test |
| Bifidobacterium longum | — | No Improvement in Physical Performance | Neutral | Small | View sourcebut did not alter physical performance in post-stroke patients. |
| Bifidobacterium longum | — | Reduced Nutritional Status | Harmful | Small | View sourcebut decreased MNA scores within the normal ranges. |
| Bifidobacterium longum B1-05 | — | Improved Cognitive Function | Beneficial | Moderate | View sourceThe OLP-01 group increased MoCA scores, decreased time to completion of Trail-Making Tests, and had greater accuracy on incongruent in Stroop Color Naming Test |
| Bifidobacterium longum B1-05 | — | No Improvement in Physical Performance | Neutral | Small | View sourcebut did not alter physical performance in post-stroke patients. |
| Bifidobacterium longum B1-05 | — | Reduced Nutritional Status | Harmful | Small | View sourcebut decreased MNA scores within the normal ranges. |