Standardized extracts (~300–600 mg/day) improve mild anxiety and sleep onset in trials.
Topical (put on the skin) lemon-balm cream shortens cold-sore (HSV-1) outbreaks when applied early. Mild thyroid-suppressing effect at high doses — monitor with hypothyroidism.
Lemon balm — بادرنجبویه — was one of Avicenna's most celebrated mufarriḥ (heart-gladdening) herbs. Its lemon-scented leaves have soothed anxious hearts, restless sleep, and irritable digestion for over a thousand years, and modern trials confirm what Persian physicians long described.
Known to botanists as Melissa officinalis.
Chapter 2 of 14
The Plant Itself
A bushy lemon-scented perennial 30–80 cm tall with square stems and bright-green crinkled heart-shaped leaves. Small whitish flowers attract bees — the genus name Melissa is Greek for 'honey bee.' The aromatic leaves carry citronellal, geranial, and rosmarinic acid, the chemistry behind lemon balm's calming, antiviral, and gut-soothing effects.
Family: Lamiaceae (mint family).
Chapter 3 of 14
Why Herbalists Still Reach for It
Most calming herbs make you dull. Lemon balm was described for a thousand years as lifting the spirits rather than flattening them, and the small modern trials on mood and alertness point the same way. That is an unusual combination and it's why the herb has lasted.
Sleep quality and emotional regulation are two of the strongest predictors of healthy aging trajectories. Lemon balm addresses both at the same time, with strong safety and trial data — and it has been the Persian evening tea for over a thousand years for exactly this reason.
It was used: trial-supported for mild anxiety, calms IBS-pattern gut tension, and topical antiviral for cold sores.
Chapter 4 of 14
What Persian Medicine Says
Persian temperament: Warm & Dry (1st degree). Mildly warming, and read in Persian practice as lifting to a heavy mood rather than sedating.
Classical Persian medicine considers lemon balm warm and dry in the first degree — uplifting for melancholy, strengthening for the heart, and soothing for a tense stomach. Avicenna called it 'the herb that makes the heart merry.'
It was used: anxiety, restless overthinking, and grief. Difficulty falling asleep (especially with racing thoughts); heart palpitations from stress.
Persian sleep teas almost always include بادرنجبویه — often paired with rose petals and chamomile in the evening pot.
Chapter 5 of 14
Traditional Formulas
Joulab-e badranjbuyeh: avicenna's heart-gladdening decoction (a drink made by simmering the plant in water) of lemon balm, rose, and licorice.
Damnoosh-e khwāb: persian sleep tea: lemon balm + rose petals + chamomile + a pinch of lavender.
Carmelite Water: 17th-century European tonic: lemon balm + lemon peel + nutmeg + angelica in alcohol or honey.
Chapter 6 of 14
What It Holds and What Studies Show
Primary compounds
Geranial and neral; caffeic acid; triterpenes.
Other notable constituents
Notable: Volatile lemon-aromatic oils
From laboratory work, not from people taking it
Lemon balm extract improved mood and calmness ratings under laboratory stress in healthy adults. Rated: moderate evidence.
Chapter 7 of 14
What Studies in People Show
What studies in people show
A lemon balm and valerian combination improved sleep quality in adults with mild insomnia in a small trial.Emerging evidence
Topical lemon balm cream shortened healing time in recurrent herpes labialis in controlled trials.Moderate evidence
Chapter 8 of 14
How It Is Prepared
Damkardeh-ye badranjbuyeh: 1–2 tsp dried leaves steeped 5 min, after dinner or 30 min before bed · Sleep blend: lemon balm + rose petals + chamomile in equal parts, 1 tsp per cup.
Cold-sore cream — apply 1% lemon-balm cream at the first tingle, 4× daily for 5 days.
Capsules and standardised extracts carry many times the amount you get from food, which is why the cautions below matter more here.
Tincture — 2–3 mL of a 1:5 alcohol tincture 2–3× daily for anxiety.
Chapter 9 of 14
Medicines and Interactions
General cautions
Medication interaction:
Surgery — discontinue 2 weeks prior (CNS depressant effect).
Specific medicines
Medication interaction:
Sedatives (medicines that make you sleepy) and sleeping tablets — Lemon balm adds to drowsiness. Taken with a benzodiazepine or a sleeping tablet it can make you groggier than expected. (moderate concern)
Medication interaction:
Thyroid medicines (levothyroxine) — Lemon balm may interfere with thyroid hormone signalling. Anyone treated for an underactive thyroid should avoid concentrated extracts. (moderate concern)
Medication interaction:
Alcohol — The combined drowsiness is stronger than either alone. Do not drive after both. (moderate concern)
Chapter 10 of 14
Who Should Be Careful
Pregnancy and breastfeeding:
Avoid medicinal doses in pregnancy without guidance.
Medication interaction:
Hypothyroidism — may suppress TSH at medicinal doses.
Pregnancy and breastfeeding:
Pregnancy — culinary use fine; reserve concentrated tinctures (a liquid extract made with alcohol) for clinician supervision.
Chapter 11 of 14
Pregnancy, Children and Older Adults
Pregnancy and breastfeeding
Pregnancy and breastfeeding:
A cup of the tea now and then is generally considered fine. Concentrated extracts and daily high-dose capsules have not been studied in pregnancy and should be left alone, particularly given the thyroid question.
Children
Children:
Weak lemon balm tea has a long tradition of use for a restless or colicky child, and small trials in children have found it acceptable. Keep it weak, keep it occasional, and speak to a doctor before giving it to an infant.
Older adults
Medication interaction:
Useful in the evening where sleep has become shallow, and gentler than most alternatives. The drowsiness matters more here: anyone already on a sedative or getting up at night should be careful of the combination.
Chapter 12 of 14
What It Goes With
Herb:
Chamomile
The standard evening pot in a Persian house: equal parts, ten minutes, lid on.
Rose:
Rose
A few dried petals with the leaf. The tea turns faintly pink and much softer.
Honey:
Honey
Stirred in after the tea has cooled a little, so the honey isn't cooked.
Herb:
Lavender
A pinch only. Lavender overwhelms lemon balm if you use as much of it.
Chapter 13 of 14
Through the Year
Spring:
Spring
The best leaf of the year. Pick before flowering, when the lemon scent is strongest.
Summer:
Summer
Grows fast and turns coarse. Cut it back and it gives tender leaf again.
Autumn:
Autumn
Dry the last cutting for winter tea. It loses scent quickly, so store it sealed.
Winter:
Winter
Dried leaf in the evening pot, often with chamomile and rose.
Chapter 14 of 14
Questions People Ask
Will it make me sleepy during the day?
On its own, rarely — most people describe it as settling rather than sedating. Combined with a sleeping tablet or alcohol it's a different story.
How quickly does it work for anxiety?
Acute calming is usually felt within 30–60 minutes of a strong cup. For trait anxiety, trials show meaningful improvement after 2–4 weeks of daily use.
