ModerateSynergy
Melatonin
Both can promote sleepiness and may cause next-day grogginess when combined.
Recommendation: Use low doses of each and avoid driving if sedated the next morning.
Lemon Balm
Herb ·Emerging evidence ·Reviewed May 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.
What it's good for
What to watch for
- 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 3 interaction records on file.
The science
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
Class
Calming mint-family botanical
Found in food
Lemon balm tea, Fresh Melissa officinalis leaves used as culinary herb
Low-status signs
None - lemon balm is not an essential nutrient and has no deficiency state
Dosing
Dosing & protocol.
Common range
300-600 mg extract one to three times daily, or tea made from 1.5-4.5 g dried leaf
Recommended form
Standardized lemon balm extract or dried leaf tea from Melissa officinalis
Can be taken with or without food. Tea has faster sensory calming effects, while capsules provide more consistent extract dosing.3
Forms
Forms & what to buy.
Ranked by evidence and value.
Lemon Balm Extract Capsule Recommended
More consistent dose than tea when standardized for rosmarinic acid. Take with food if GI upset occurs.
Dried Lemon Balm Tea
Gentler and lower potency; aromatic compounds contribute to sensory calming. Steep covered to preserve volatile oils.
Lemon Balm Tincture
Rapid, flexible dosing but alcohol content varies. Avoid alcohol-based tinctures with sedatives or liver disease.
Cost
What it actually costs.
Real-world pricing across three quality tiers. Assumes Lemon balm extract capsule.
BudgetBest value
$3 /mo
$0.10 per dose
Mid
$8 /mo
$0.25 per dose
Premium
$17 /mo
$0.55 per dose
Tea is usually cheapest; standardized rosmarinic-acid extracts cost more but are easier to dose consistently. Updated 2026-06-04.
Goals
Goal-based dosing.
Calm and Stress
Dose: 300-600 mg extract daily or as needed3
Timing: Morning or afternoon
Start low to assess sedation before driving or work.
Sleep Onset
Dose: 300-600 mg extract or tea 30-60 minutes before bed
Timing: Evening
Most useful when sleep difficulty is stress-related.
Nervous Stomach
Dose: Tea 1-3 times daily or 300 mg extract
Timing: Between meals or after meals
May soothe stress-related digestive tension; persistent pain, bleeding, weight loss, or vomiting needs medical assessment.
Why people use it
Symptoms it's matched to.
Where this appears in the symptom-to-supplement map, ranked by relevance.
Anxiety
60% relevance
Rosmarinic acid may support GABAergic calming pathways.2,1
MoodEmerging evidenceStandardized extract or tea
Appropriate for mild stress support, not panic disorder or severe anxiety alone.
Difficulty falling asleep
50% relevance
Calming and mild sedative effects may reduce stress-related sleep latency.
SleepEmerging evidenceTea or evening capsule
Avoid if it causes morning grogginess.
Nervous stomach
42% relevance
Mint-family aromatic and smooth-muscle effects may ease stress-related digestive discomfort.
DigestiveInsufficient evidenceDried leaf tea
Persistent or severe GI symptoms need evaluation.
Safety
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
Interactions
Interaction records.
InfoSynergy
L-Theanine
Both support calm without strong respiratory depression, but additive drowsiness is possible.
Recommendation: Reasonable daytime combination at low doses; assess alertness before demanding tasks.
ModerateCaution
Ashwagandha
Both can reduce stress arousal and may cause sedation; ashwagandha also has thyroid-related cautions.
Recommendation: Avoid high-dose stacking in thyroid disease or when using sedatives; monitor fatigue and thyroid symptoms.
Sources
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-analysisNeeds reviewNo linkGhazizadeh 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 TrialNeeds reviewNo linkNoguchi-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)Needs reviewNo linkKennedy DO et al. · Neuropsychopharmacology · 2002
Single doses improved calmness and altered cognitive task performance in healthy volunteers.
Keep exploring
Deep dives & adjacent profiles.
This page is educational. Do not start, stop, or change a supplement or medication based on it without checking with a qualified healthcare professional.
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.