Herb Profile
Lemon Balm
Melissa officinalis
Systematic review/meta analysis suggests improved anxiety and depression scores without serious side effects, but high heterogeneity and small number of trials limit confidence.
Last reviewed: •6 sources citedReport a correctionProfile-wide ·B Moderate
Use extra caution — No serious side effects in reviewed anxiety/depression trials, but sedation and thyroid/medication flags should be reviewed before strong recommendations. Details
- Evidence
- Moderate Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Sleep, Stress, Cognitive function, Inflammatory signaling
- Avoid / review if
- Additive With CNS Depressants (Benzodiazepines, Alcohol), Caution In Hypothyroidism
Safety
Safety & Cautions
No serious side effects in reviewed anxiety/depression trials, but sedation and thyroid/medication flags should be reviewed before strong recommendations.
High caution
Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.
- Interaction-AwareMedication or interaction context is explicitly noted.
- Hormonal Activity ContextHormone-adjacent wording is present and should be interpreted carefully.
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- Additive With CNS Depressants (Benzodiazepines
- Alcohol)
- Caution In Hypothyroidism
Safety classifications
- Interaction-Aware: Medication or interaction context is explicitly noted.
- Hormonal Activity Context: Hormone-adjacent wording is present and should be interpreted carefully.
Full safety note
- No serious side effects in reviewed anxiety/depression trials, but sedation and thyroid/medication flags should be reviewed before strong recommendations.
Safety labels
- Interaction-Aware
- Hormonal Activity Context
Evidence-based safety
Caution when combined
Severity and certainty are shown separately. A high-priority caution can still be theoretical: these pairings are screened from shared contraindication mechanisms and are not automatically documented clinical interactions. Provenance identifies the source fields that produced each flag; it does not upgrade the certainty of the pairwise claim.
Moderate Caution
68 flagged pairingsSedation / CNS depression
Moderate Caution
68 flagged pairingsSedation / CNS depression
Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.
Sedation / CNS depressionCertainty: Theoretical
Data provenance recorded for 68 of 68 pairings in this mechanism group.
- American Yellow Lotus — Theoretical interaction certainty
- Artemisia Absinthium — Theoretical interaction certainty
- Ashwagandha (Withania somnifera) — Theoretical interaction certainty
- Bacopa — Theoretical interaction certainty
- Black Seed — Theoretical interaction certainty
- Black Tea — Theoretical interaction certainty
- Blue Lotus — Theoretical interaction certainty
- Calamus — Theoretical interaction certainty
- Catuba — Theoretical interaction certainty
- Celastrus Paniculatus — Theoretical interaction certainty
- Chamomile — Theoretical interaction certainty
- Chinese Skullcap — Theoretical interaction certainty
+56 more pairings share this mechanism. Use the Safety Checker to review a specific combination.
Evidence
Evidence Summary
Evidence lens
Useful signal, but study design, dose, and population still matter.
ModerateModerate Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Inflammatory Signaling Modulation · Oxidative Stress Modulation · Neurotransmitter Modulation
Research maturity: Established research — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — No serious side effects in reviewed anxiety/depression trials, but sedation and thyroid/medication flags should be reviewed before strong recommendations.
This profile cites 6 human studies.
Study design details
Evidence Grade
Grade B: Moderate Evidence
Evaluation of methodological rigor, population reach, and evidence alignment.
- Design Match
- Meta-analysis
- Risk of Bias
- Low
- Consistency
- Consistent
Strongest recorded design is a meta-analysis, drawn from 7 recorded studies, 4 in people. No disagreement is recorded across them.
How evidence grades work
Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.
- Strong
- Multiple RCTs, consistent direction, adequate effect size
- Moderate
- Some RCTs or consistent observational data in humans
- Preliminary / Mixed
- Animal or in-vitro only, or conflicting human data
- Traditional / Theoretical
- Traditional use only; no controlled human trials
Clinical Study Summaries (6)3 human evidence sources · 1 human trial · Participant totals not consistently reported · Consistency not yet classifiable
Filter by study class
Showing 6 of 6 studies.
What the evidence actually shows
This table contains 6 structured sources, including 3 human evidence sources; 1 is a human trial.
| Study | Design | N | Dose | Duration | Population | Outcome | Result & magnitude | Source |
|---|---|---|---|---|---|---|---|---|
PubMed · Phytother Res · 2021 Background | Meta-analysis Statistically combines results from multiple eligible studies; confidence still depends on the quality, consistency, and directness of those studies. | — | — | — | — | — | — | PubMed → |
Javid Ghazizadeh; S. Sadigh-Eteghad; W. Marx; A. Fakhari; S. Hamedeyazdan; Mohammadali Torbati; Somaiyeh Taheri-Tarighi; Mostafa Araj-khodaei; M. Mirghafourvand · Phytotherapy Research · 2021 Background | Meta-analysis Statistically combines results from multiple eligible studies; confidence still depends on the quality, consistency, and directness of those studies. | — | — | — | — | — | — | Source → |
Background | Randomized controlled trial Randomly assigns participants to interventions or controls, reducing many sources of bias when the trial is conducted well. | — | — | — | — | — | One month of lemon-balm essential-oil inhalation reduced state/trait anxiety and several symptom-burden measures versus control. | PubMed → |
Depression and Its Phytopharmacotherapy-A Narrative Review Dobrek L et al. · Int J Mol Sci · 2023 Background | Narrative review Summarizes selected literature without the full prespecified search and selection methods of a systematic review. | — | — | — | — | — | — | PubMed → |
Medicinal Plants Used for Anxiety, Depression, or Stress Treatment: An Update Kenda M et al. · Molecules · 2022 Background | Narrative review Summarizes selected literature without the full prespecified search and selection methods of a systematic review. | — | — | — | — | — | — | PubMed → |
A Narrative Review of Alternative Symptomatic Treatments for Herpes Simplex Virus Chang JY et al. · Viruses · 2023 Background | Narrative review Summarizes selected literature without the full prespecified search and selection methods of a systematic review. | — | — | — | — | — | — | PubMed → |
Dosing & Timing
- No standardized dose
- Varies by extract/form; newer standardized extracts should be tracked separately from tea, essential oil, or combination products. | Lemon balm extracts, oral formulations, and sometimes aromatherapy/combination products; do not merge.
How Lemon Balm works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Lemon Balm Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & biological pathways (preclinical)
- Inflammatory Signaling Modulation
- Oxidative Stress Modulation
- Neurotransmitter Modulation
- Stress Response Modulation
- Neuroprotective Activity
Active Compounds
Key constituents studied in Lemon Balm, with full pharmacology and safety profiles.
Compare related active botanicals
Explore botanicals with similar chemistry, effects, or safety considerations in the Botanical Activity Atlas.
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Sourcing options
Lemon Balm product picks
Recommendation status
Product recommendations are not shown for this profile because the current site safety and monetization policy does not permit them.
Product form & quality guidelines
When sourcing Lemon Balm, verify the label for:
- Standardized extract: Confirm active content percentages on the supplement facts panel (e.g. standardized to specific marker compounds) rather than simple raw herb weights.
- Third-party testing: Look for independent purity labels (USP, NSF, ConsumerLab, or Eurofins) to ensure the product is free from heavy metals, solvents, and contaminants.
- Form bioavailability: Ensure the form matches evidence-supported configurations (e.g. standardized active extracts like bacosides, withanolides, or curcuminoids) for optimal onset and digestion tolerance.
Safety first · Harm reduction
This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.
Learn how we evaluate confidence, safety, and intensity on the methodology page.
Founder & Head Researcher · Oak Ridge, TN · Last reviewed August 2026
Editorial Review
Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.
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