Lemon Balm

Also known as: Melissa officinalis, melissa, sweet balm

Grade B — Moderate Evidenceherbanxietysleep
300–600 mgAnxiety: any time. Sleep: 30-60 min before bed, often combined with valerian.

Lemon balm (Melissa officinalis) is a calming herb from the mint family that inhibits GABA transaminase, effectively increasing GABA levels in the brain. Clinical trials demonstrate improvements in calmness, alertness, and cognitive function, with acute anxiolytic effects measurable within 1-2 hours. It also has mild antiviral properties (particularly against herpes simplex) and is one of the gentlest herbal anxiolytics, suitable for both adults and children.

TL;DR: Gentle anxiolytic herb that provides calmness without sedation. Pairs well with valerian for sleep. Watch thyroid interactions.

🧘Stress & Anxiety🌙Sleep🧠Cognitive Performance
Last reviewed: 2026-03-12

Quick Facts

Evidence

Grade B

Studies

2

Interactions

2

Forms

1

Evidence Rating: Grade B — Moderate Evidence

Some RCTs with positive results, or strong observational evidence. More research may refine our understanding.

Interaction Warnings

Thyroid medicationsModerate

Rosmarinic acid inhibits TSH binding and T4 uptake; avoid in hypothyroidism or monitor TSH

Sedatives / CNS depressantsModerate

Additive calming; caution with benzodiazepines, alcohol

Important Notes

  • Thyroid interaction is the main safety concern
  • Cognitive calmness without sedation at lower doses
  • Topical 1% cream effective for cold sores

Clinical Evidence (2 studies)

Lemon balm reduced anxiety and improved mood

Kennedy DO et al. (2004) — Psychosom Med

300mg and 600mg reduced anxiety and improved mood; crossover RCT

View on PubMed

Valerian + lemon balm improved sleep quality

Müller SF, Klement S (2006) — Phytomedicine

Significantly improved sleep quality in insomnia; RCT

View on PubMed

Alternatives to Consider

These supplements target similar goals and may be worth considering alongside or instead of Lemon Balm.

Magnesium Glycinate

Grade A

Highly bioavailable form of magnesium. Strong evidence for sleep quality, muscle relaxation, and stress reduction. Most adults are deficient.

🌙 Sleep🧘 Stress & Anxiety

Ashwagandha

Grade A

Ayurvedic adaptogen with strong clinical evidence for cortisol reduction (15-30%), stress relief, and exercise performance.

🧘 Stress & Anxiety🌙 Sleep

Kava

Grade A

Cochrane-validated anxiolytic: significant anxiety reduction comparable to benzodiazepines. Use noble cultivar water extracts to minimize liver risk.

🧘 Stress & Anxiety🌙 Sleep

Related Supplements

Passionflower

Grade B — Moderate Evidence

Gentle anxiolytic herb comparable to low-dose oxazepam. Effective for pre-surgical anxiety and sleep without next-day impairment.

L-Theanine

Grade B — Moderate Evidence

Amino acid from green tea. Promotes calm focus (alpha brain waves) without drowsiness. Excellent safety profile.

Valerian Root

Grade B — Moderate Evidence

Traditional sleep herb with moderate RCT support. Comparable to low-dose benzodiazepines. Not acutely sedating — builds over weeks.

Kava

Grade A — Strong Evidence

Cochrane-validated anxiolytic: significant anxiety reduction comparable to benzodiazepines. Use noble cultivar water extracts to minimize liver risk.

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⚕️ Important Disclaimer

This information is for educational purposes only. It is not medical advice. Always consult a healthcare provider before starting any supplement regimen, especially if you take medications or have health conditions.

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