Lemon Balm
Herb ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
Lemon balm is a Melissa officinalis leaf preparation used for calm, stress, sleep, and mild digestive tension. Human trials suggest possible reductions in anxiety and improvements in calmness, but study sizes and preparations vary. It is usually well tolerated, though sedation, thyroid-medication concerns, and perioperative use should be handled cautiously.
Exploratory record, not a reviewed medical publication.
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This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
Lemon Balm is a herb most often used for promotes calm and relaxation, may reduce mild anxiety or stress symptoms, may support sleep onset when paired with sleep hygiene. NutriStack rates the overall evidence as emerging. A typical adult dose is 300-600 mg extract one to three times daily, or tea made from 1.5-4.5 g dried leaf, commonly taken as standardized lemon balm extract or dried leaf tea from melissa officinalis. This profile indexes 3 sources.
- Drowsiness, fatigue, or reduced alertness
- Nausea, abdominal pain, or increased appetite
- Headache or dizziness
- Pregnancy and breastfeeding due to limited safety data for concentrated extracts1
- Use with sedatives, alcohol, or sleep medications without clinician guidance
The bottom line
Evidence rating emerging. Most-documented uses: promotes calm and relaxation, may reduce mild anxiety or stress symptoms, may support sleep onset when paired with sleep hygiene. 3 sources indexed (2002–2022), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Lemon balm contains rosmarinic acid and other polyphenols that may inhibit GABA transaminase and support calming GABAergic tone. Volatile oils and phenolics may also influence cholinergic signaling and smooth-muscle relaxation. Effects can overlap with sedatives and thyroid-related therapies, so conservative dosing is appropriate.2,1
Dosing & protocol.
Can be taken with or without food. Tea has faster sensory calming effects, while capsules provide more consistent extract dosing.3
What it actually costs.
Real-world pricing across three quality tiers. Assumes Lemon balm extract capsule.
Tea is usually cheapest; standardized rosmarinic-acid extracts cost more but are easier to dose consistently. Updated 2026-06-04.
Full safety detail.
Side effects
- Drowsiness, fatigue, or reduced alertness
- Nausea, abdominal pain, or increased appetite
- Headache or dizziness
- Possible worsening of reflux in sensitive people from mint-family aromatics
- Allergic reaction in mint-family sensitivity
Contraindications
- Pregnancy and breastfeeding due to limited safety data for concentrated extracts1
- Use with sedatives, alcohol, or sleep medications without clinician guidance
- Thyroid disease or levothyroxine use without clinician review
- Planned surgery because of possible additive sedation
- Children unless using age-appropriate products under clinician guidance
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
1- 1The effects of lemon balm (Melissa officinalis L.) on depression and anxiety in clinical trials: A systematic review and meta-analysisGhazizadeh J et al. · Phytotherapy Research · 2021
Pooled trials suggested symptom improvement without serious adverse effects, but heterogeneity and small samples limit confidence.
Randomized controlled trials
2- 2Effects of Melissa officinalis Extract Containing Rosmarinic Acid on Cognition in Older Adults Without Dementia: A Randomized Controlled TrialNoguchi-Shinohara M et al. · Journal of Alzheimer's Disease · 2022
A standardized extract was tolerable and studied for cognitive outcomes in older adults.
- 3Modulation of mood and cognitive performance following acute administration of single doses of Melissa officinalis (Lemon balm)Kennedy DO et al. · Neuropsychopharmacology · 2002
Single doses improved calmness and altered cognitive task performance in healthy volunteers.
Common questions.
Quick answers about Lemon Balm, drawn from the data on this page.
What is Lemon Balm?
Lemon balm is a Melissa officinalis leaf preparation used for calm, stress, sleep, and mild digestive tension. Human trials suggest possible reductions in anxiety and improvements in calmness, but study sizes and preparations vary. It is usually well tolerated, though sedation, thyroid-medication concerns, and perioperative use should be handled cautiously.
What is Lemon Balm used for?
Commonly cited benefits of Lemon Balm include: Promotes calm and relaxation; May reduce mild anxiety or stress symptoms; May support sleep onset when paired with sleep hygiene; May soothe nervous stomach or functional digestive tension. NutriStack rates the overall evidence as emerging.
What is a typical dose of Lemon Balm?
A typical adult dose of Lemon Balm is 300-600 mg extract one to three times daily, or tea made from 1.5-4.5 g dried leaf. The commonly recommended form is Standardized lemon balm extract or dried leaf tea from Melissa officinalis. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Lemon Balm?
Reported side effects include drowsiness, fatigue, or reduced alertness, nausea, abdominal pain, or increased appetite, headache or dizziness, possible worsening of reflux in sensitive people from mint-family aromatics, allergic reaction in mint-family sensitivity. This is educational information; check with a healthcare professional before use.
How strong is the evidence for Lemon Balm?
NutriStack rates this as Emerging, meaning early RCT signal, mechanistic data, or limited human evidence. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Lemon Balm in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.