Lemon Balm (Melissa officinalis): The 2,000-Year Calming Herb Avicenna Is Credited With, Carmelite Friars Distilled as Eau de Melisse, and the University of Ottawa Found Strongly Inhibits the GABA-Destroying Enzyme

What is Lemon Balm?

Between 1996 and 2013, the share of American adults filling a prescription for anxiety drugs like Xanax, Valium, and Klonopin rose from 4.1 to 5.6 percent, and the overdose death rate involving them rose more than fivefold, from 0.58 to 3.07 per 100,000 adults. It is an industry built on chemical anxiety suppression, physical dependency, and a calming brain system that Carmelite friars in Paris had already been distilling into a pharmacy bottle by the seventeenth century, using a plant that grows like a weed.

This is the story of a plant Europeans have reached for to settle the mind for two thousand years. A leaf that acts on the same calming GABA system as those drugs - but, in laboratory studies, by an entirely different route. One you can grow in a pot on your porch for the cost of a single pharmacy co-pay.

Its name is lemon balm (Melissa officinalis). The Greeks named it after the honey bee. Avicenna is credited with prescribing it "to make the heart merry." John Evelyn called it "sovereign for the brain." And in 2007, a research team at the University of Ottawa screened it alongside other traditional anti-anxiety plants and found it strongly inhibited GABA transaminase, the enzyme that breaks down the brain's calming messenger.

From Avicenna's Canon to John Evelyn & the 1611 Eau de Melisse des Carmes

The Greeks: The Honey Bee's Plant

The Greeks named it melissa, their word for "honey bee," because bees would never abandon a hive where it grew. Beekeepers rubbed crushed leaves inside a new hive to persuade a swarm to settle. The Latin epithet Linnaeus assigned in 1753 - officinalis - literally means "of the pharmacy": the label medieval and early-modern pharmacopoeias gave to a plant kept as an official medicine. The plant's own scientific name records its two-thousand-year status: the honey bee's plant, kept on the pharmacy shelf.

1025 Persia: Avicenna's Canon of Medicine

Avicenna (Ibn Sina) - the Persian physician-philosopher whose Canon of Medicine remained the standard European medical textbook for over 500 years - is traditionally credited with prescribing lemon balm for one very specific purpose: to gladden the heart. The attribution is traditional rather than traced to a specific passage, but the phrase "makes the heart merry" was repeated by European herbalists such as John Gerard for centuries.

1696-1699 England: Youth, Memory & Melancholy

By the seventeenth century, the claims had grown bold. In 1696, the London Dispensary promised that an essence of balm in Canary wine, taken every morning, would "renew youth." In 1699, the diarist and gardener John Evelyn wrote: "Balm is sovereign for the brain, strengthening the memory, and powerfully chasing away melancholy."

1611 Paris: Eau de Melisse des Carmes

The archive opens in Paris. In 1611, the Discalced Carmelite friars at the Rue de Vaugirard began distilling a preparation - angelica root, lemon peel, coriander, nutmeg, and one foundational leaf - into a spirit the world came to know as Eau de Melisse des Carmes. It was taken for fainting, nervous headaches, and upset stomachs, and the court of Louis XIV adopted it. And the foundation of every version was always the same: lemon balm.

The Carmelite formula never disappeared. It is still produced in France under the same name today, and its German cousin - Klosterfrau Melissengeist, first produced by Maria Clementine Martin in Cologne - has been sold continuously since 1826. Two centuries of commercial production in Germany. Four centuries of production in France. Two millennia of use.

The 2007 Ottawa GABA-Transaminase Study, Kennedy at Northumbria & the Alzheimer's Trials

2007 University of Ottawa: The Ten-Plant Bioassay

In 2007, a research team at the University of Ottawa led by Rosalie Awad ran a bioassay published in the Canadian Journal of Physiology and Pharmacology. They tested ten plants traditionally used for anxiety against one specific molecular target: GABA transaminase. This is the enzyme your body uses to destroy GABA, your brain's primary calming neurotransmitter. When GABA levels drop, panic and anxiety rise. When the enzyme is blocked, GABA accumulates, and the brain quiets down.

Lemon balm stood out, strongly inhibiting GABA transaminase in this laboratory work on rat brain enzyme. A 2009 follow-up traced the activity largely to rosmarinic acid, a phenolic acid found throughout the leaves. Block that enzyme, and more of the brain's own GABA stays in play: a different route from any pharmaceutical benzodiazepine. Whether the same happens in the human brain after drinking the tea has not been measured.

Benzodiazepines vs. Rosmarinic Acid: Same Effect, Different Path

Benzodiazepines (Xanax, Valium, Klonopin) work by binding directly and artificially to your brain's GABA receptors. They are effective. They are also physically addictive. Between 1996 and 2013, the share of US adults filling a benzodiazepine prescription rose from 4.1 to 5.6 percent (a 2016 study in the American Journal of Public Health), and overdose deaths involving these drugs rose more than fivefold. Yale addiction specialists have called benzodiazepine dependency the "secondary epidemic" following opioids.

Lemon balm does not force your receptors to fire. In laboratory studies it slows the breakdown of the brain's own natural GABA, rather than mimicking it artificially. No dependency data. No overdose risk. The FDA lists it as Generally Recognized As Safe (GRAS) under 21 CFR §182.20.

Kennedy at Northumbria (2003, 2004): Measurable Mood & Cognition

In 2003, Kennedy et al. at Northumbria University in the UK published a double-blind placebo-controlled trial in Neuropsychopharmacology. Single standardized doses of lemon balm produced measurable improvements in mood and memory-related performance - without sedation. A follow-up trial in 2004 in Psychosomatic Medicine gave 18 healthy volunteers single doses before a stressful battery of computer tasks: at 600 mg, lemon balm blunted the negative mood effects of stress and raised self-rated calmness; at 300 mg, math processing got faster with no loss of accuracy.

Akhondzadeh 2003: The Alzheimer's Trial

A 2003 Iranian clinical trial by Akhondzadeh et al., published in the Journal of Neurology, Neurosurgery and Psychiatry, treated 42 patients with mild-to-moderate Alzheimer's disease with daily lemon balm extract for four months. The treated group showed better cognitive scores, and agitation was more common on placebo.

Then came a larger test. Researchers at Kanazawa University in Japan gave 323 older adults with mild memory complaints a rosmarinic acid-rich extract or placebo for 96 weeks, published in 2023. Overall, there was no significant difference in cognition. Lemon balm is a calming herb with measured effects on mood and stress; it is not a proven treatment for dementia.

Recent Trials, Antiviral Activity & European Regulation

Modern research has continued to accumulate. A 2024 review in Nutrients by a University of Reading team found consistent signs of benefit for stress, mood, and sleep with excellent tolerability, while calling for larger, better-standardized trials. A separate line of research - Wolbling & Leonhardt 1994 in Phytomedicine, and Koytchev et al. 1999 in Phytomedicine - demonstrated that a topical 1% Melissa officinalis extract cream significantly shortens the duration of herpes simplex (cold sore) outbreaks, through rosmarinic-acid inhibition of viral attachment. That cream is a registered over-the-counter product in Germany. On the regulatory side, the European Medicines Agency carries an official monograph for the leaf; Germany's Commission E approves it for nervous sleep disturbances and functional gastrointestinal complaints; the European Scientific Cooperative on Phytotherapy (ESCOP) lists it for tension, restlessness, irritability, and minor sleep problems.

Why It Stays Buried: The 1994 DSHEA & Why Your Doctor Cannot Prescribe It

1994: The Dietary Supplement Health and Education Act

In 1994, the Dietary Supplement Health and Education Act (DSHEA) passed the US Congress. Senators Orrin Hatch of Utah and Tom Harkin of Iowa sponsored it, and President Bill Clinton signed it in October.

The law created a permanent regulatory divide:

• Approved drugs can be labeled and marketed as treatments for disease.
• Herbal supplements can be sold in a grocery store - but cannot be labeled as a treatment for any disease. A label may say "supports relaxation"; it may not say "treats anxiety."

An herb cannot appear on a prescription pad. It cannot be the subject of a phase-3 clinical trial funded by any institution with return-on-investment expectations, because a plant that already grows in a garden cannot be patented. No patent means no return on investment. No return means no funding. No funding means no large-scale US trials. No large-scale trials means your American doctor has no FDA-approved evidence base to stand on.

The Structure Was Not Aimed at Lemon Balm Specifically

The structure was not designed to suppress lemon balm specifically. It was designed to ensure that anything growing freely in a garden can never legally compete with anything sold under a corporate patent. Lemon balm was obsolete as a commercial pharmaceutical target before the ink on DSHEA dried. It had been in common use for two thousand years. You cannot patent two thousand years.

How to Consume Lemon Balm (Tea, Tincture, Fresh Leaves & Cold-Sore Cream)

The active volatile compounds in lemon balm are heat-sensitive, so preparation technique matters more than most herbs. Four standard forms.

1. Tea (the traditional daily preparation)

1. Place 1 to 2 teaspoons of dried leaves (or 2 to 3 tablespoons of fresh leaves) in a cup.
2. Pour over water that is hot but not boiling - roughly 175°F / 80°C, the same temperature you would use for green tea. Boiling water destroys the volatile essential oils that carry much of the calming effect.
3. Cover the cup and steep 10 minutes. The cover matters - it traps the volatile oils that would otherwise evaporate.
4. Strain and sweeten with honey if desired.

Dose: 2 to 3 cups daily, most commonly taken in the evening for sleep or during a stressful day for calm.

2. Tincture (the strongest, most shelf-stable form)

A tincture is an alcohol extract that pulls more of the active compounds out of the leaf than water and stores shelf-stable for years. This is the form used in most European clinical trials.

Typical adult dose: 2 to 4 ml of a 1:5 tincture, 2 to 3 times daily in a little water. Start at the low end of the range for the first week to judge your response, then adjust upward if needed.

3. Fresh Leaves (the fast lift)

Chew a fresh leaf directly for a fast lemon-bright hit - useful before public speaking, a nervous moment, or in place of an afternoon coffee. Toss chopped fresh leaves into salad, fruit salad, or ice water. Muddle into cocktails or lemonade. Add to the last minute of a soup or pasta dish.

4. Topical Cream (for herpes cold sores)

A 1% Melissa officinalis extract cream, applied 2 to 4 times daily at the earliest tingle of a cold sore, has been shown in German clinical studies (Wolbling & Leonhardt 1994, Koytchev et al. 1999) to shorten outbreak duration significantly. This is a registered over-the-counter product in Germany. In the US it is available online from European brands.

Harvest & Storage

Harvest timing: for maximum rosmarinic acid, harvest the leaves BEFORE the plant flowers. Once flowering starts the essential oil composition shifts and the calming compounds decline. Cut stems in the morning after the dew has dried.

Drying: hang small bundles upside down in a warm, dark, airy place for about 2 weeks until brittle. Strip the leaves into a sealed jar out of light. Holds potency about a year.

Honest Safety Notes

• THYROID. Laboratory studies show lemon balm extracts can interfere with thyroid-stimulating hormone (TSH) binding. If you have a thyroid condition or take thyroid medication (levothyroxine), talk to your doctor first.
• Sedative & benzodiazepine interactions. Do not combine with prescription sedatives, benzodiazepines, barbiturates, or alcohol without medical supervision - the effects compound.
• Surgery. Stop lemon balm at least 2 weeks before scheduled surgery due to interaction with GABA-modulating anesthetics.
• Pregnancy and breastfeeding. Human safety data is limited - use only with medical guidance.
• Glaucoma. A few case reports of intraocular pressure effects - consult your ophthalmologist first.
• Alzheimer's / anxiety treatment. Do not stop or replace prescribed treatment with lemon balm. If you want to combine, talk to your clinician first.

How to Source Lemon Balm (Grow, Forage & Buy)

1. Grow Your Own (by far the easiest)

Lemon balm is one of the most forgiving perennials on Earth - it grows in any garden, any pot, any window box. Perennial in USDA zones 4-9. Broadcast seed on well-drained soil in spring or fall, cover 1/8 inch, keep moist for 2 weeks. Full sun to part shade. Tolerates poor soil, drought, and neglect once established.

WARNING: like most mints, lemon balm spreads aggressively by rhizome and self-seeding. Plant it in a container or a dedicated bed unless you want a lemon-balm meadow. If you plant it in the open garden, deadhead flowers to reduce spread.

Cultivars:

• Wild-type Melissa officinalis - for maximum medicinal potency (rosmarinic acid, citral).
• 'Aurea' and 'All Gold' - variegated golden foliage; still medicinal but often lower essential oil.
• 'Quedlinburger Niederliegende' - German high-yield medicinal cultivar; if you can find seed.

Harvest: cut leaves before flowering for peak rosmarinic acid. The plant will regrow for continuous cuttings - typically 2-3 harvests per season.

2. Forage (in some regions)

Lemon balm has escaped cultivation and naturalized in many temperate parts of Europe and North America. Look for it in old herb gardens, along country lanes, and in disturbed edges near abandoned farmhouses.

The decisive ID: crush a leaf and smell it - if it does not smell strongly of lemon and honey, it is not lemon balm. Nothing else in the mint family carries this bright citrus scent. Confirm with the other three mint-family features:

• Square stems (all Lamiaceae).
• Opposite leaves - pairs of leaves at each node, arranged at 90 degrees to the pair above.
• Ovate, serrated, deeply veined leaves.

Rules: only harvest from clean ground - never sprayed roadsides or lawn-treated edges. Leave plenty of the patch to keep the population going.

3. Buy Dried Herb, Tincture, or Capsules

Reputable herb suppliers and Amazon stock dried lemon balm leaf, tincture, capsules, and untreated seed. What to look for on a label:

• The Latin name spelled out: Melissa officinalis.
• The plant part specified: leaf, not just "lemon balm powder."
• For tinctures: herb-to-alcohol ratio (typically 1:5) and alcohol percentage (typically 40-50%).
• For capsules: milligram dose per capsule (typically 300-600 mg).
• Organic or wildcrafted certification where available.
• Purchase in small quantities - dried leaf loses potency within about a year.

Frequently Asked Questions

What is lemon balm and where does the name come from?

Lemon balm (Melissa officinalis L.) is a perennial mint-family herb native to south-central Europe, the Mediterranean, and western Asia. It grows 2-3 feet tall, has opposite serrated ovate leaves, and gives off a strong lemon-and-honey scent when the leaves are crushed.

The genus name is Greek: melissa means "honey bee". The ancients named it that because bees will not abandon a hive where lemon balm grows nearby - beekeepers used to rub crushed leaves inside a new hive to persuade a swarm to settle. The species name officinalis is Latin for "of the workshop" or "of the pharmacy" - the label the medieval and early-modern pharmacopoeias gave to any plant kept as an official medicine. In other words, the plant's own name literally records its two-thousand-year status: the honey bee's plant, kept on the pharmacy shelf.

Avicenna is traditionally credited with prescribing it in his Canon of Medicine "to make the heart merry." In 1699 John Evelyn called it "sovereign for the brain, strengthening the memory, and powerfully chasing away melancholy." In 1611 the Discalced Carmelite friars of the Rue de Vaugirard in Paris distilled it into the preparation known as Eau de Melisse des Carmes, and its German cousin Klosterfrau Melissengeist has been produced continuously since 1826.

What does lemon balm actually do? What is the GABA-transaminase mechanism?

Lemon balm's calming effect works through a well-documented brain chemistry pathway. In 2007 a research team led by Rosalie Awad at the University of Ottawa published a bioassay in the Canadian Journal of Physiology and Pharmacology. They screened plants traditionally used for anxiety against a single molecular target: GABA transaminase - the enzyme the brain uses to destroy GABA, the primary calming neurotransmitter.

When GABA transaminase is inhibited, GABA levels rise and the brain quiets down. Lemon balm stood out as a strong inhibitor of GABA transaminase in this laboratory work on rat brain enzyme, and a 2009 follow-up traced the activity largely to rosmarinic acid. This is a different route from benzodiazepines (Xanax, Valium, Klonopin), which force artificial GABA-receptor activation and produce the physical dependency Yale addiction specialists have called the "secondary epidemic" after opioids.

Two Northumbria University clinical trials led by David Kennedy - published in Neuropsychopharmacology (2003) and Psychosomatic Medicine (2004) - documented that single standardized doses of lemon balm measurably improved mood and, in the 2004 study of 18 volunteers, increased calmness under laboratory stress at 600 mg, without sedation. A 2003 double-blind placebo-controlled trial by Akhondzadeh et al. in the Journal of Neurology, Neurosurgery and Psychiatry treated 42 mild-to-moderate Alzheimer's patients with lemon balm extract for four months and documented better cognitive scores and less agitation. A larger 2023 Kanazawa University trial in 323 older adults found no overall cognitive benefit, so lemon balm is not a proven treatment for dementia.

Is lemon balm safe? What are the contraindications and drug interactions?

For most healthy adults, lemon balm has an excellent safety record - it is on the FDA GRAS (Generally Recognized As Safe) list under 21 CFR §182.20, and the European Medicines Agency, Germany's Commission E, and ESCOP all carry official monographs for the leaf. But because lemon balm is a real medicine with real mechanisms, it carries real contraindications:

• Thyroid. Laboratory studies show lemon balm extracts can interfere with thyroid-stimulating hormone (TSH) binding. If you have a thyroid condition or take thyroid medication (such as levothyroxine), talk to your doctor first.
• Sedative / benzodiazepine interactions. Because it works through the GABAergic system, do not combine it with prescription sedatives, benzodiazepines, barbiturates, or alcohol without medical supervision - the effects compound.
• Surgery. Stop lemon balm at least 2 weeks before scheduled surgery due to the interaction with anesthetics that also modulate GABA.
• Pregnancy and breastfeeding. Human safety data is limited; use only with medical guidance.
• Glaucoma. Some case reports of intraocular pressure effects; consult your ophthalmologist first.
• Alzheimer's / anxiety treatment. Do not stop or replace prescribed treatment with lemon balm products. If you want to combine, talk to your clinician first.

How do you prepare and use lemon balm - tea, tincture, and fresh leaves?

The active volatile compounds in lemon balm are heat-sensitive, so preparation technique matters. Four standard forms:

1. Tea (the traditional daily preparation): 1 to 2 teaspoons of dried leaves (or 2 to 3 tablespoons of fresh leaves) per cup. Pour over water that is hot but not boiling - roughly 175°F / 80°C, the same temperature you would use for green tea. Cover the cup and steep 10 minutes. Cover matters - it traps the volatile essential oils that would otherwise evaporate. Dose: 2 to 3 cups daily.
2. Tincture (the strongest, most reliable form): 2 to 4 ml of a 1:5 tincture, 2 to 3 times daily in a little water. Most concentrated and shelf-stable form.
3. Fresh leaves: chew a leaf or two directly for a fast lemon-bright hit. Toss chopped fresh leaves into salad, fruit salad, or ice water. Muddle into cocktails.
4. Topical cream (for herpes cold sores): a 1% Melissa officinalis extract cream applied 2-4 times daily has been shown in German studies (Wolbling & Leonhardt 1994; Koytchev et al. 1999) to shorten cold-sore duration.

Harvest timing: for maximum rosmarinic acid, harvest the leaves before the plant flowers - once flowering starts the essential oil composition shifts and the calming compounds decline. Cut stems in the morning after the dew has dried.

Where can you source lemon balm - grow, forage, or buy?

Three routes.

(1) Grow your own (by far the easiest). Lemon balm is one of the most forgiving perennials on Earth - it grows in any garden, any pot, any window box. Perennial in USDA zones 4-9. Broadcast seed on well-drained soil in spring or fall; cover 1/8 inch, keep moist for 2 weeks. Full sun to part shade. Tolerates poor soil, drought, and neglect once established. Warning: like most mints, lemon balm spreads aggressively - plant it in a container or a dedicated bed unless you want a lemon-balm meadow. Harvest leaves before flowering for peak rosmarinic acid.

(2) Forage. Lemon balm has escaped cultivation and naturalized in many temperate parts of Europe and North America - look for it in old herb gardens, along country lanes, and in the disturbed edges near abandoned farmhouses. Confirm the ID by the strong lemon scent when a leaf is crushed (decisive check - nothing else in the mint family smells this bright), the square stems typical of Lamiaceae, and the opposite serrated ovate leaves. Do not gather from sprayed roadsides.

(3) Buy. Reputable herb suppliers and Amazon stock dried lemon balm leaf (for tea), tincture, capsules, and untreated seed. On a label, look for: the Latin name Melissa officinalis spelled out; the plant part specified (leaf, not just "lemon balm powder"); for tinctures, the herb-to-alcohol ratio (typically 1:5) and alcohol percentage (typically 40-50%); and organic or wildcrafted certification where possible. Dried leaf loses potency within about a year - buy in small quantities from a supplier with high turnover.