Know2eat

Bacopa

Bacopa monnieri

Herbs & Botanicals

What bacopa may help with

Ranked by how strong the human evidence is — best supported first.

Best supportedCognitive functionLimited evidence· 3 sources

Then, in order

5 things to know first — allergies, interactions and limits

About Bacopa

A creeping marsh plant used in Ayurveda for memory, standardised to bacosides — a group of triterpenoid saponins. Note that the name "brahmi" is also used for gotu kola, which is an unrelated plant.

Bacopa has a reasonably consistent set of small randomised trials showing modest improvements in memory acquisition and information processing, most notably a slowing of the rate at which newly learned material is forgotten. The effect takes around 12 weeks to appear, which means short trials will miss it and users often stop before it would show. Trials are small and largely from Indian and Australian centres.

Sold as
Standardised extract capsule, Whole herb powder, Tincture, Ghee preparation
Standardised to
Commonly 20–55% bacosides; one widely studied extract is standardised on a defined bacoside profile — a product without this marker may not resemble what was studied.
Also known as
Brahmi, Water hyssop, Herb of grace

What the research used

The amounts, forms and durations published trials of Bacopa actually administered.

These are the amounts published trials administered — not a recommendation, and not a dose to copy. Trial participants were screened, supervised and given a characterised preparation. What is in a retail bottle is frequently not what was studied, and the amount that suits one person is not general advice.

  • Studied for Memory and cognition

    300–450 mg

    Limited

    Standardised extract, daily · 50–55% bacosides in most trials · 12 weeks minimum

    Trials shorter than about 12 weeks generally found nothing, which is a strong argument that duration matters more than dose here. Bacoside content varies widely between retail products.

This is general information about food, not medical advice. It cannot diagnose, treat or replace guidance from a clinician who knows your history.

When it was taken

Each window says whether a trial compared it against an alternative, or whether it is convention and pharmacology. Most timing advice is the second kind.

None of the timings below were directly compared in a trial. They reflect how the research happened to dose, or what the pharmacology implies — which is not the same as a timing being better.

  • With food

    Not enough

    Taken with food in most protocols because bacopa commonly causes nausea and cramping on an empty stomach. Absorption with food has not been formally compared.

    Timing was not directly compared. This reflects convention or how the compound behaves in the body, not a trial showing this window works better.

The evidence in depth

Best supported: Limited

What each association actually rests on, and the papers behind it. A rating describes the state of the research, not how promising the supplement sounds. How we rate evidence.

Cognitive function

Brain & Cognitive Health
Limited evidence

Pooled small trials report modest improvements in memory acquisition and delayed recall after about 12 weeks, with the clearest signal on the rate of forgetting. Trials are small, use different extracts and test batteries, and the practical size of the effect is uncertain.

What may be going on: Bacosides have been linked to cholinergic activity and dendritic branching in animal models.

Limited evidence. Early human work, or mostly lab and animal research.

View the 3 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Stress and anxiety

Mental Wellbeing
Not enough evidence

Evidence is limited for bacopa and anxiety. Some cognitive trials measured anxiety as a secondary outcome with inconsistent results.

Not enough evidence. Not enough human research to say anything useful yet.

View the 4 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Things to know

Interactions, contraindications and dose limits, most serious first. Concentrated extracts interact with medication in ways the whole plant does not, so this section carries more weight here than it does on a food page.

  • Worth knowing

    Digestive upset is common

    Nausea, abdominal cramping, increased stool frequency and dry mouth were significantly more common than placebo in pooled trials, and are the main reason people stop.

  • Interaction

    Thyroid hormone and cholinergic drugs

    Interacts withLevothyroxine, donepezil, anticholinergic drugs

    Animal work reports increased thyroxine levels, and bacopa has cholinergic activity that could add to acetylcholinesterase inhibitors or oppose anticholinergic medicines.

  • Interaction

    Sedatives and calcium channel blockers

    Interacts withBenzodiazepines, calcium channel blockers

    Bacopa may add to sedative medication, and preclinical work suggests calcium channel blocking activity relevant to blood pressure medication.

  • Worth knowing

    Ayurvedic sourcing and heavy metals

    As with other Ayurvedic botanicals, imported products have been found contaminated with lead, mercury and arsenic. Bacopa also accumulates heavy metals from the water it grows in, which makes source water quality a specific concern.

  • Avoid

    Pregnancy data are absent

    No adequate safety studies exist in pregnancy or breastfeeding.

Evidence ratings on this page: 1 limited evidence, 1 not enough evidence.

Supplements are sold in the US without pre-market review of efficacy or safety. Nothing on this page is a recommendation to take Bacopa, or a dose to follow.