Bacopa monnieri

Also known as: Brahmi, Water hyssop

An Ayurvedic herb studied for memory and learning.

Common forms: Standardized extract capsules

Draft summary, not yet reviewed by a qualified health professional · Last updated 2026-11-03

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This information is for education only and is not medical advice, diagnosis, or treatment. Supplements can interact with medications and health conditions. Check with your doctor or pharmacist before starting anything, especially if you take medication, are pregnant or breastfeeding, or have a health condition. These statements have not been evaluated by the FDA; supplements are not intended to diagnose, treat, cure, or prevent any disease.

What the evidence says

Memory

CLimited evidence

Meta-analyses found modest improvements in attention speed and some memory measures after at least 12 weeks; trials are small and results vary.

Dose used in studies: 300 mg/day standardized extract
Time to effect: ≥12 weeks

Studies (2)

Meta-analysis of randomized controlled trials on cognitive effects of Bacopa monnieri extract — J Ethnopharmacol, 2014 · Meta-analysis · PMID 24252493
The cognitive-enhancing effects of Bacopa monnieri: a systematic review of randomized, controlled human clinical trials — J Altern Complement Med, 2012 · Systematic review · PMID 22747190

Safety

Common side effects

Nausea
Stomach cramps
Fatigue

Pregnancy & breastfeeding

Not enough safety data — avoid unless your provider recommends it.

Medication interactions

minorThyroid medication: May affect thyroid hormone levels in animal studies.
minorSedatives / sleep medications: May add to sedative effects.

This list covers common medication classes only and is not exhaustive.

Buying tips

Look for third-party testing seals (USP Verified, NSF Certified, or Informed Choice) and match the form and dose used in studies.

Where to buy (affiliate)