Plant Profile

Lemon balm

Melissa officinalis
Family: Lamiaceae  ·  Parts used: Flower, Leaf  ·  Also known as: bee balm, sweet balm

The complete database record: 4 documented constituents, 6 pharmacological actions, 10 traditional / indicated uses, with 20 cited sources.

Botanical Description

Perennial herb, 30-70 (up to 150) cm tall, with square, branched, hairy stems typical of the mint family. Leaves are opposite, ovate to heart-shaped with a toothed margin, wrinkled and softly hairy, releasing a strong lemon scent when crushed. Small, pale yellow to white, two-lipped flowers are borne in loose whorls in the leaf axils. The fruit splits into four small nutlets.[6]

Height: 30-70 (up to 150) cm
Habit: Erect, bushy perennial herb
Leaves: Opposite, ovate to heart-shaped, toothed, wrinkled, lemon-scented when crushed
Flowers: Small, pale yellow to white, two-lipped, in loose axillary whorls
Stem: Square, branched, hairy
Root: Fibrous, spreading perennial rootstock
Fruit: Four small nutlets (typical Lamiaceae schizocarp)
Flowering Period: June-August

Habitat & Distribution

Native to southern Europe, the Mediterranean and western Asia, widely cultivated and naturalised in gardens, hedgebanks and waste ground across temperate regions, favouring sunny to lightly shaded, well-drained soils.[6]

Harvesting

Leaves and flowering tops are cut just before or at the start of flowering (summer), when the volatile-oil content is highest, and dried quickly at low temperature away from direct light, since the aromatic oil is heat- and light-sensitive.[6]

Parts: Leaf, Flowering tops
Season: Summer, just before or at flowering

Key Constituents

Rosmarinic acid and phenolic acids[4, 6]

The principal phenolic acid of lemon balm, associated with much of its antioxidant and antiviral activity.

Rosmarinic acid
Essential oil (citral, citronellal)[4, 10]

The volatile oil (geranial and neral, together called citral, plus citronellal) gives the characteristic lemon scent and has demonstrated anxiolytic activity.

Essential (volatile) oilCitral (neral / geranial)
Flavonoids[4]

Contribute to the antioxidant activity of the leaf.

Flavonoids
Triterpenic acids (ursolic acid, oleanolic acid)[4]

Minor constituents studied for anti-inflammatory activity.

Pharmacological Actions

Anti-inflammatory[4, 6, 13, 14, 15]
Antioxidant[4, 6, 7, 13, 14, 15]
Antispasmodic[6, 13, 14, 15]

Antispasmodic (cramp easing)

Antiviral[4, 6, 8, 13, 14, 15]
Digestive aid[6, 13, 14, 15]
Sedative / sleep support[1, 2, 4, 6, 7, 10, 13, 14, 15]

Traditional & Indicated Uses

Arthritis / joint pain[13, 14, 15]Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5
Label: Arthritis / joint pain

more plants for arthritis / joint pain →detailed sources →

Bloating[13, 14, 15]Moderate · 5/10

inferred from digestive action

Evidence: 5
Label: Bloating

more plants for bloating →detailed sources →

Cold & flu[8, 13, 14, 15]Good · 8/10

inferred from antiviral action

Evidence: 8
Label: Cold & flu

more plants for cold & flu →detailed sources →

Indigestion[13, 14, 15]Moderate · 5/10

inferred from digestive action

Evidence: 5
Label: Indigestion

more plants for indigestion →detailed sources →

Infection (general)[8, 13, 14, 15]Good · 8/10

inferred from antiviral action

Evidence: 8
Label: Infection (general)

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Inflammation (general)[13, 14, 15]Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5
Label: Inflammation (general)

more plants for inflammation (general) →detailed sources →

Insomnia / sleeplessness[13, 14, 15]Moderate · 5/10

inferred from sedative action

Evidence: 5
Label: Insomnia / sleeplessness

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Menstrual cramps[13, 14, 15]Moderate · 5/10

inferred from antispasmodic action

Evidence: 5
Label: Menstrual cramps

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Muscle spasm[13, 14, 15]Moderate · 5/10

inferred from antispasmodic action

Evidence: 5
Label: Muscle spasm

more plants for muscle spasm →detailed sources →

Skin irritation[13, 14, 15]Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5
Label: Skin irritation

more plants for skin irritation →detailed sources →

Traditional Use & History

Lemon balm has a long European tradition as a calming, 'cheering' herb for nervous tension, poor sleep and mild anxiety, and as a carminative for indigestion, bloating and cramping; topically it has traditionally been applied to cold sores. Modern clinical trials support anxiolytic and mood-related benefits and antiviral activity against herpes simplex virus, consistent with these traditional uses.[4, 6, 9]

Preparations

Infusion (tea)[6]

Dried leaf steeped in hot water, the classic way of taking lemon balm for calming and digestive support.

Standardised extract capsule[1, 2]

Encapsulated dry extract, the form used in clinical trials studying lemon balm for anxiety and mood; follow product-specific dosing.

Topical cream[8]

Concentrated leaf extract cream applied to cold sores (herpes labialis) at the earliest sign of an outbreak.

Tincture[12]

Tincture of the dried leaf, 2-6 ml one to three times daily per the EU herbal monograph. Educational reference only, not a prescription.

Dosage

Infusion (tea)[12]

The EU herbal monograph gives 1.5-4.5 g of the comminuted leaf in 150 mL of boiling water as an infusion, 1-3 times daily, in adolescents over 12, adults and elderly; a liquid extract at 2-4 mL and a tincture at 2-6 mL, both 1-3 times daily, are also listed. If symptoms persist longer than 2 weeks a healthcare practitioner should be consulted. Not recommended under 12 years. Educational reference only, not a prescription.

Standardised extract[1, 2]

Clinical trials for anxiety and mood have used standardised dry-extract capsules; dosing varies by product concentration, so follow the manufacturer's guidance. Educational reference only, not a prescription.

Safety, Cautions & Contraindications

Safety note[13, 14, 15]Caution

Generally very safe for adults. Theoretically may interact with thyroid medications and sedatives. Avoid high therapeutic doses during pregnancy. Long-term safety data beyond a few months is limited.

Safety note[13, 14, 15, 16]Info

Duke (2002) does not include a dedicated entry under 'Lemon Balm' or 'Melissa' in the Handbook of Medicinal Herbs, Second Edition.

Herb-Drug Interactions

Sedatives Cns Depressants[17, 18, 19]Caution
Mechanism: Lemon balm has calming, sedative effects (a randomised controlled trial found it reduces anxiety, stress and sleep disturbance); 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

Herb-Herb Pairings

Passionflower[18, 20]

Lemon balm and passionflower are both gentle, GABA-acting calming herbs often blended together in anti-anxiety and sleep formulas; combined use may deepen relaxation but also add to drowsiness.

Type: synergy
Reviewed By: Omnia Sana (owner-authorized)
Reviewed Date: 2026-07-03

Harvest Readiness

[11]

Part: leaf
Signals: Gather the leaves from late spring to early autumn, ideally just before flowering for the best flavour and oil.
Basis: traditional
Source Quote: Leaves can be harvested from late spring to early autumn, ideally just before flowering for the best flavor.
Species Confirmed: 1
Notes: PFAF (REF-3292); the leaves are gathered just before flowering (late spring to early autumn), when the aromatic oil is best. Single lineage -> provisional.

[11]

Part: flower
Signals: Gather the flowering tops just before or as the plant comes into flower, in summer.
Basis: traditional
Source Quote: harvested just before or just after flowering
Species Confirmed: 1
Notes: PFAF (REF-3292); for drying, the plant is gathered just before or just after flowering (in flower June-October). Single lineage -> provisional.

External Identifiers

References & Sources

  1. Mathews, I.M., Eastwood, J., Lamport, D.J., Cozannet, R.L. and others (2024) 'Clinical Efficacy and Tolerability of Lemon Balm (Melissa officinalis L.) in Psychological Well-Being: A Review', Nutrients, 16(20), pp. 3545. doi:10.3390/nu16203545 Meta-analysis / review
    https://doi.org/10.3390/nu16203545
  2. Ghazizadeh, J., Sadigh-Eteghad, S., Marx, W., Fakhari, A. and others (2021) 'The effects of lemon balm (Melissa officinalis L.) on depression and anxiety in clinical trials: A systematic review and meta-analysis', Phytotherapy Research, 35(12), pp. 6690-6705. doi:10.1002/ptr.7252 Meta-analysis / review
    https://doi.org/10.1002/ptr.7252
  3. Shahsavari, K., Shams Ardekani, M.R., Khanavi, M., Jamialahmadi, T. and others (2024) 'Effects of Melissa officinalis (lemon balm) consumption on serum lipid profile: a meta-analysis of randomized controlled trials', BMC Complementary Medicine and Therapies, 24(1), pp. 146. doi:10.1186/s12906-024-04442-0 Meta-analysis / review
    https://doi.org/10.1186/s12906-024-04442-0
  4. Petrisor, G., Motelica, L., Craciun, L.N., Oprea, O.C. and others (2022) 'Melissa officinalis: Composition, Pharmacological Effects and Derived Release Systems-A Review', International Journal of Molecular Sciences, 23(7), pp. 3591. doi:10.3390/ijms23073591 Meta-analysis / review
    https://doi.org/10.3390/ijms23073591
  5. Heshmati, J., Morvaridzadeh, M., Sepidarkish, M., Fazelian, S. and others (2020) 'Effects of Melissa officinalis (Lemon Balm) on cardio-metabolic outcomes: A systematic review and meta-analysis', Phytotherapy Research, 34(12), pp. 3113-3123. doi:10.1002/ptr.6744 Meta-analysis / review
    https://doi.org/10.1002/ptr.6744
  6. Shakeri, A., Sahebkar, A. and Javadi, B (2016) 'Melissa officinalis L. - A review of its traditional uses, phytochemistry and pharmacology', Journal of Ethnopharmacology, 188, pp. 204-228. doi:10.1016/j.jep.2016.05.010 Meta-analysis / review
    https://doi.org/10.1016/j.jep.2016.05.010
  7. Zam, W., Quispe, C., Sharifi-Rad, J., Lopez, M.D. and others (2022) 'An Updated Review on The Properties of Melissa officinalis L.: Not Exclusively Anti-anxiety', Frontiers in Bioscience (Scholar Edition), 14(2), pp. 16. doi:10.31083/j.fbs1402016 Meta-analysis / review
    https://doi.org/10.31083/j.fbs1402016
  8. Chang, J.Y., Balch, C., Puccio, J. and Oh, H.S (2023) 'A Narrative Review of Alternative Symptomatic Treatments for Herpes Simplex Virus', Viruses, 15(6), pp. 1314. doi:10.3390/v15061314 Meta-analysis / review
    https://doi.org/10.3390/v15061314
  9. Ulbricht, C., Brendler, T., Gruenwald, J., Kligler, B. and others (2005) 'Lemon balm (Melissa officinalis L.): an evidence-based systematic review by the Natural Standard Research Collaboration', Journal of Herbal Pharmacotherapy, 5(4), pp. 71-114. doi:10.1080/j157v05n04_08 Meta-analysis / review
    https://doi.org/10.1080/j157v05n04_08
  10. Stojanovic, N.M., Mladenovic, M.Z., Maslovaric, A., Stojiljkovic, N.I. and others (2021) 'Lemon balm (Melissa officinalis L.) essential oil and citronellal modulate anxiety-related symptoms - In vitro and in vivo studies', Journal of Ethnopharmacology, 284, pp. 114788. doi:10.1016/j.jep.2021.114788 Preclinical
    https://doi.org/10.1016/j.jep.2021.114788
  11. Plants For A Future 'Melissa officinalis (Lemon Balm)'. Available at: https://pfaf.org/user/Plant.aspx?LatinName=Melissa+officinalis Traditional / reference
    https://pfaf.org/user/Plant.aspx?LatinName=Melissa+officinalis
  12. European Medicines Agency (HMPC) (2013) 'Community herbal monograph on Melissa officinalis L., folium'. Available at: https://www.ema.europa.eu/en/documents/herbal-monograph/final-community-herbal-monograph-melissa-officinalis-l-folium_en.pdf Traditional / reference
    https://www.ema.europa.eu/en/documents/herbal-monograph/final-community-herbal-monograph-melissa-officinalis-l-folium_en.pdf
  13. Hoffmann, D (2003) 'Medical Herbalism'. Traditional / reference
    https://scholar.google.com/scholar?q=Medical%20Herbalism
  14. Kennedy, D.O. et al (2002) 'Modulation of mood and cognitive performance following acute administration of Melissa officinalis', 27(2), pp. 256--261. doi:10.1016/s0091-3057(02)00777-3 Randomized trial
    https://doi.org/10.1016/s0091-3057(02)00777-3
  15. Petersen, M. and Simmonds, M.S.J (2003) 'Rosmarinic acid', 62(2), pp. 121--125. Traditional / reference
    https://scholar.google.com/scholar?q=Rosmarinic%20acid
  16. 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
  17. 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
  18. 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
  19. Haybar, H., Javid, A.Z., Haghighizadeh, M.H., Valizadeh, E., Mohaghegh, S.M. and Mohammadzadeh, A (2018) 'The effects of Melissa officinalis supplementation on depression, anxiety, stress, and sleep disorder in patients with chronic stable angina', Clinical Nutrition ESPEN, 26, pp. 47-52. doi:10.1016/j.clnesp.2018.04.015 Randomized trial
    https://doi.org/10.1016/j.clnesp.2018.04.015
  20. Keck, M.E., Nicolussi, S., Spura, K., Blohm, C., Zahner, C. and Drewe, J (2020) 'Effect of the fixed combination of valerian, lemon balm, passionflower, and butterbur extracts (Ze 185) on the prescription pattern of benzodiazepines in hospitalized psychiatric patients', Phytotherapy Research, 34(6), pp. 1436-1445. doi:10.1002/ptr.6618 Clinical study
    https://doi.org/10.1002/ptr.6618

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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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