Plant Profile

Water Hyssop

Bacopa monnieri
Family: Plantaginaceae  ·  Parts used: Leaf, Whole plant  ·  Also known as: Bacopa, brahmi, herb of grace

The complete database record: 2 documented constituents, 5 pharmacological actions, 7 traditional / indicated uses, with 21 cited sources.

Botanical Description

Low, creeping, succulent perennial herb that roots at the nodes as it spreads across wet ground. The leaves are small, fleshy, spatula-shaped and arranged oppositely along the trailing stems. Small, pale lavender to white, four- to five-petalled flowers are borne singly in the leaf axils.[4]

Height: 5-15 cm (trailing/creeping)
Habit: Low, creeping, succulent perennial herb
Leaves: Small, fleshy, spatula-shaped, opposite
Flowers: Small, pale lavender to white, four- to five-petalled, borne singly in leaf axils
Stem: Trailing, succulent, rooting at the nodes
Root: Fine roots at each node along the creeping stem
Fruit: Small ovoid capsule
Flowering Period: Year-round in warm, wet climates

Habitat & Distribution

Grows in wet, marshy ground, muddy shorelines, rice paddies and shallow water throughout tropical and subtropical regions of Asia, and also found in parts of Africa, Australia and the Americas.[4]

Harvesting

The whole plant (leaf and trailing stem) is harvested during active growth, typically cut a few centimetres above the mud or water line, and dried or used fresh.

Parts: Leaf, Whole Plant
Season: During active growth (warm season)

Key Constituents

Triterpenoid saponins (bacosides A and B)[1, 4]

Principal bioactive saponins linked to the plant's neuroprotective and cognition-enhancing effects.

SaponinsTriterpene saponins
Flavonoids and alkaloids[6]

Additional antioxidant and neuroactive constituents.

FlavonoidsAlkaloids

Pharmacological Actions

Anti-inflammatory[9, 14]
Anticancer (preclinical)[3, 15, 16]

Bacopa monnieri (Brahmi) extract and its saponins (bacopaside II, bacopasaponins) inhibit proliferation and induce apoptosis in colon and lung cancer cells (preclinical).

Antioxidant[6, 8, 9, 14]
Neuroprotective / cognition support[1, 3, 4, 5, 6, 7, 10, 14, 17, 18]
Sedative / sleep support[1, 14]

Traditional & Indicated Uses

Arthritis / joint pain[14]Preliminary · 1/10

inferred from anti-inflammatory action

Mechanistic Exclude Ids: REF-2112
Evidence: 1
Label: Arthritis / joint pain

more plants for arthritis / joint pain →detailed sources →

Cancer (anticancer research)[3, 15, 16]Preliminary · 2/10

Bacopaside II from Bacopa monnieri inhibits colon cancer cell growth via cell-cycle arrest and apoptosis (aquaporin-1 blockade), and its bacopasaponins are cytotoxic to lung (PC9) and colon (SW620) cancer cells (preclinical).

Evidence: 2
Label: Cancer (anticancer research)

more plants for cancer (anticancer research) →detailed sources →

Cognitive function[14, 17, 18]Moderate · 6/10

inferred from neuroprotective action

Evidence: 6
Label: Cognitive function

more plants for cognitive function →detailed sources →

Inflammation (general)[14]Preliminary · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Inflammation (general)

more plants for inflammation (general) →detailed sources →

Insomnia / sleeplessness[14]Preliminary · 1/10

inferred from sedative action

Mechanistic Exclude Ids: REF-0740
Evidence: 1
Label: Insomnia / sleeplessness

more plants for insomnia / sleeplessness →detailed sources →

Memory[14, 17, 18]Moderate · 6/10

inferred from neuroprotective action

Evidence: 6
Label: Memory

more plants for memory →detailed sources →

Skin irritation[14]Preliminary · 1/10

inferred from anti-inflammatory action

Mechanistic Exclude Ids: REF-2112
Evidence: 1
Label: Skin irritation

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Traditional Use & History

Bacopa (brahmi) is a classic Ayurvedic 'medhya rasayana' (brain-nourishing) herb, traditionally used to support memory, learning and mental clarity, and as a calming nervine for anxiety and disturbed sleep. This traditional cognitive reputation is now supported by randomised controlled trials of standardised extracts.[1, 4]

Preparations

Standardised extract[1, 4]

Extract standardised to bacoside content, taken as capsules or tablets; the form used in most clinical trials for cognitive support.

Dosage

Standardised extract[1, 4]

Clinical trials for cognitive support commonly use extracts providing around 300 mg dried extract daily, taken for at least several weeks, since benefits accrue gradually. Educational reference only, not a prescription.

Safety, Cautions & Contraindications

Safety note[14, 17, 18]Caution

Generally well tolerated at standard doses. The most commonly reported side effects are gastrointestinal - nausea, stomach cramps, and increased bowel movements - which can be reduced by taking with food. Not recommended during pregnancy. May interact with medications that increase acetylcholine levels (e.g. Alzheimer's medications). Use with caution in thyroid conditions, as bacopa may increase thyroid hormone levels.

Safety note[14, 17, 18, 19]Info

Duke (2002) does not include a dedicated entry for Bacopa monnieri (water hyssop/brahmi) in the Handbook of Medicinal Herbs, Second Edition.

Herb-Drug Interactions

Sedatives Cns Depressants[20, 21]Caution
Mechanism: Bacopa (brahmi) is traditionally used as a calming, sedative herb; taken with sedatives, sleeping tablets or other central-nervous-system depressants (including alcohol) it may add to drowsiness and slowed reactions.
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

Harvest Readiness

[13]

Part: whole-plant
Signals: Harvest the whole plant (the leafy soft stems) during active growth in the warm season, at the mature/flowering stage, when active-compound (bacoside) content is highest.
Basis: constituent
Constituent Note: A growth-stage study reports the harvest window for peak actives: 'this period should be considered for Brahmi harvesting to obtain high active compounds and crop yield' (week 12, which coincides with peak flowering).
Source Quote: Regarding capacity per plant, the highest content of active compounds was found in week 12.
Species Confirmed: 1
Notes: Thai Journal of Agricultural Science growth-stage study (REF-3215). Week 12 of cultivation coincides with peak flowering / mature active growth; there is no traditional-collection source, so the signal rests on the constituent-peak study (basis: constituent). Single source -> provisional.

[13]

Part: leaf
Signals: Handpick the leaves and soft stems during active growth in the warm season, at the mature/flowering stage when bacoside content peaks.
Basis: constituent
Source Quote: Regarding capacity per plant, the highest content of active compounds was found in week 12.
Species Confirmed: 1
Notes: Thai Journal of Agricultural Science growth-stage study (REF-3215). Single source -> provisional.

External Identifiers

References & Sources

  1. Calabrese, C., Gregory, W.L., Leo, M., Kraemer, D. et al (2008) 'Effects of a standardized Bacopa monnieri extract on cognitive performance, anxiety, and depression in the elderly: a randomized, double-blind, placebo-controlled trial', Journal of Alternative and Complementary Medicine, 14(6), pp. 707-713. doi:10.1089/acm.2008.0018 Randomized trial
    https://doi.org/10.1089/acm.2008.0018
  2. Lorca, C., Mulet, M., Arévalo-Caro, C., Sanchez, M.Á. et al (2022) 'Plant-derived nootropics and human cognition: A systematic review', Critical Reviews in Food Science and Nutrition, 63(22), pp. 5521-5545. doi:10.1080/10408398.2021.2021137 Meta-analysis / review
    https://doi.org/10.1080/10408398.2021.2021137
  3. Fatima, U., Roy, S., Ahmad, S., Ali, S. et al (2022) 'Pharmacological attributes of Bacopa monnieri extract: Current updates and clinical manifestation', Frontiers in Nutrition, 9, pp. 972379. doi:10.3389/fnut.2022.972379 Traditional / reference
    https://doi.org/10.3389/fnut.2022.972379
  4. Kongkeaw, C., Dilokthornsakul, P., Thanarangsarit, P., Limpeanchob, N. and Norman Scholfield, C (2014) 'Meta-analysis of randomized controlled trials on cognitive effects of Bacopa monnieri extract', Journal of Ethnopharmacology, 151(1), pp. 528-535. doi:10.1016/j.jep.2013.11.008 Meta-analysis / review
    https://doi.org/10.1016/j.jep.2013.11.008
  5. Vinod, A., Sathianarayanan, S., Babu, A.E., Sadanandan, P., Venu, A.K. and Venkidasamy, B (2022) 'Bacopa monnieri for disorders affecting brain: current perspectives', Current Topics in Medicinal Chemistry, 22(23), pp. 1909-1929. doi:10.2174/1568026622666220119111538 Meta-analysis / review
    https://doi.org/10.2174/1568026622666220119111538
  6. Dubey, T., Kushwaha, P., Thulasiram, H.V., Chandrashekar, M. and Chinnathambi, S (2023) 'Bacopa monnieri reduces Tau aggregation and Tau-mediated toxicity in cells', International Journal of Biological Macromolecules, 234, pp. 123171. doi:10.1016/j.ijbiomac.2023.123171 Preclinical
    https://doi.org/10.1016/j.ijbiomac.2023.123171
  7. Shalini, V.T., Neelakanta, S.J. and Sriranjini, J.S (2021) 'Neuroprotection with Bacopa monnieri - a review of experimental evidence', Molecular Biology Reports, 48(3), pp. 2653-2668. doi:10.1007/s11033-021-06236-w Meta-analysis / review
    https://doi.org/10.1007/s11033-021-06236-w
  8. Simpson, T., Pase, M. and Stough, C (2015) 'Bacopa monnieri as an antioxidant therapy to reduce oxidative stress in the aging brain', Evidence-Based Complementary and Alternative Medicine, 2015, pp. 615384. doi:10.1155/2015/615384 Meta-analysis / review
    https://doi.org/10.1155/2015/615384
  9. Saini, N., Singh, D. and Sandhir, R (2019) 'Bacopa monnieri prevents colchicine-induced dementia by anti-inflammatory action', Metabolic Brain Disease, 34(2), pp. 505-518. doi:10.1007/s11011-018-0332-1 Preclinical
    https://doi.org/10.1007/s11011-018-0332-1
  10. Dubey, T. and Chinnathambi, S (2019) 'Brahmi (Bacopa monnieri): an ayurvedic herb against the Alzheimer's disease', Archives of Biochemistry and Biophysics, 676, pp. 108153. doi:10.1016/j.abb.2019.108153 Meta-analysis / review
    https://doi.org/10.1016/j.abb.2019.108153
  11. Bhandari, P., Kumar, N., Singh, B. and Kaul, V.K (2007) 'Cucurbitacins from Bacopa monnieri', Phytochemistry, 68(9), pp. 1248-1254. doi:10.1016/j.phytochem.2007.03.013 Preclinical
    https://doi.org/10.1016/j.phytochem.2007.03.013
  12. Sivaramakrishna, C., Rao, C.V., Trimurtulu, G., Vanisree, M. and Subbaraju, G.V (2005) 'Triterpenoid glycosides from Bacopa monnieri', Phytochemistry, 66(23), pp. 2719-2728. doi:10.1016/j.phytochem.2005.09.016 Preclinical
    https://doi.org/10.1016/j.phytochem.2005.09.016
  13. Thai Journal of Agricultural Science 'Changes in Antioxidant Activity and Active Compounds of Bacopa monnieri (L.) Wettst. Over Successive Growth Stages', Thai Journal of Agricultural Science. Available at: https://li01.tci-thaijo.org/index.php/TJAS/article/view/246032 Preclinical
    https://li01.tci-thaijo.org/index.php/TJAS/article/view/246032
  14. World Health Organization (2002) 'WHO Monographs on Selected Medicinal Plants'. Traditional / reference
    https://scholar.google.com/scholar?q=WHO%20Monographs%20on%20Selected%20Medicinal%20Plants
  15. Smith, E. and Palethorpe, H.M. and Tomita, Y. and Pei, J.V. and Townsend, A.R. and Price, T.J. and Young, J.P. and Yool, A.J. and Hardingham, J.E (2018) 'The Purified Extract from the Medicinal Plant Bacopa monnieri, Bacopaside II, Inhibits Growth of Colon Cancer Cells In Vitro by Inducing Cell Cycle Arrest and Apoptosis', Cells, 7(7), pp. 81. doi:10.3390/cells7070081 Preclinical
    https://doi.org/10.3390/cells7070081
  16. Yen, D.T.H. and Cuc, N.T. and Tai, B.H. and Van Kiem, P. and Hoang Duc, M. and Nhiem, N.X. and Cho, S.-H. and Jeong, S.B. and Seo, Y. and Park, S (2022) 'Two new triterpenoid glycosides from Bacopa monnieri and their cytotoxic activity', Natural Product Research, 38(7), pp. 1120-1126. doi:10.1080/14786419.2022.2132498 Preclinical
    https://doi.org/10.1080/14786419.2022.2132498
  17. Calabrese, C., Gregory, W.L., Leo, M., Kraemer, D., Bone, K. and Oken, B (2008) 'Effects of a standardized Bacopa monnieri extract on cognitive performance, anxiety, and depression in the elderly', 14(6), pp. 707--713. Randomized trial
    https://scholar.google.com/scholar?q=Effects%20of%20a%20standardized%20Bacopa%20monnieri%20extract%20on%20cognitive%20performance%2C%20anxiety%2C%20and%20depression%20in%20the%20elderly
  18. Stough, C., Lloyd, J., Clarke, J., Downey, L.A., Hutchison, C.W., Rodgers, T. and Nathan, P.J (2001) 'The chronic effects of an extract of Bacopa monniera (Brahmi) on cognitive function in healthy human subjects', 156(4), pp. 481--484. doi:10.1007/s002130100815 Randomized trial
    https://doi.org/10.1007/s002130100815
  19. Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
    https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition
  20. Ghasemzadeh Rahbardar, M. and Hosseinzadeh, H (2024) 'Therapeutic potential of hypnotic herbal medicines: A comprehensive review', Phytotherapy Research, 38(6), pp. 3037-3059. doi:10.1002/ptr.8201 Meta-analysis / review
    https://doi.org/10.1002/ptr.8201
  21. Block, K.I., Gyllenhaal, C. and Mead, M.N (2004) 'Safety and efficacy of herbal sedatives in cancer care', Integrative Cancer Therapies, 3(2), pp. 128-148. doi:10.1177/1534735404265003 Meta-analysis / review
    https://doi.org/10.1177/1534735404265003

This fact sheet is generated automatically from the Omnia Sana plant database and reflects its latest synced data. It is provided for educational purposes only and is not medical advice. How this site is built.

Selected studies & references

Educational use only. This profile summarises traditional and scientific sources for reference. It is not medical advice and not a substitute for a qualified practitioner. Some plants carry safety cautions and drug interactions - always check before use.
This profile is assembled automatically from the Omnia Sana plant database, which we curate by hand. How this site is built.
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