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Evidence-Based Supplement Research
Evidence-Based Supplement Research

Bacopa and Improved Attention Span

Research synthesisLow evidenceSmall effect3 studies · 3 beneficial · 0 neutral · 0 harmful

Across all 3 studies in the database, Bacopa showed beneficial effects on improved attention span, with 2 studies reporting small effect sizes and 1 reporting a moderate effect. The only study reporting a dose used 160 mg/day, and effects were observed in a clinical population with mild cognitive impairment at a median duration of 60 days. The evidence base is very small, so findings should be considered preliminary.

  • Effective dose range: 160 mg/day
  • Studied populations: patients with mild cognitive impairment

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed).

Generated May 15, 2026
Doses used in studies
  • mg/day: 160 (median 160, IQR 160160) 1 study
Time to effect
Median: 8.6 weeks · IQR 8.6 weeks8.6 weeks · Range 8.6 weeks8.6 weeks — Reported in 1 of 3 studies
3 of 3 papers
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