The cognitive-enhancing effects of Bacopa monnieri: a systematic review of randomized, controlled human clinical trials
Key Finding
Bacopa monnieri consistently improves memory and attention speed after 12+ weeks of supplementation.
Plain-English Summary
This systematic review and meta-analysis examined nine randomized controlled trials investigating the cognitive effects of Bacopa monnieri in healthy adults. The review included studies with treatment durations ranging from 12 to 24 weeks.
The analysis revealed that Bacopa monnieri has the potential to improve cognition, particularly speed of attention and memory consolidation. The most consistent finding across studies was improved memory acquisition and retention, with effects becoming more pronounced with longer supplementation periods.
Studies typically used doses between 300-450mg daily of standardized bacopa extract. The researchers noted that benefits generally required at least 12 weeks of continuous supplementation to manifest, suggesting bacopa works through long-term neurological changes rather than acute effects. Minor gastrointestinal side effects were occasionally reported but were generally mild.