Lemon Balm – Effects, Uses and Dosage
Lemon balm (Melissa officinalis) is a medicinal herb known for its calming properties. It is traditionally used for stress, sleep problems, and digestive complaints.
Things worth knowing about "Lemon Balm"
Lemon balm (Melissa officinalis) is a medicinal herb known for its calming properties. It is traditionally used for stress, sleep problems, and digestive complaints.
What is Lemon Balm?
Lemon balm (Latin: Melissa officinalis) is a perennial medicinal herb belonging to the mint family (Lamiaceae). Native to southern Europe and western Asia, it is cultivated worldwide as both a garden and medicinal plant. Its characteristic lemon-like scent comes from essential oils found in its leaves. Lemon balm has been valued in folk medicine since antiquity and is today used in phytotherapy, cooking, and the cosmetics industry.
Active Compounds and Constituents
The medicinal effects of lemon balm are attributed to several bioactive compounds:
- Rosmarinic acid: A potent antioxidant with anti-inflammatory properties.
- Essential oils: Including citral, citronellal, and linalool, responsible for the typical lemon scent and calming effects.
- Flavonoids: Plant secondary metabolites with antioxidant activity.
- Tannins: Contribute to antimicrobial and antiviral effects.
- Triterpenic acids: Such as ursolic acid and oleanolic acid, with potential anti-inflammatory effects.
Traditional Use
Lemon balm has been used in traditional medicine for centuries. Hippocrates and Paracelsus described its calming and stomach-strengthening properties. It has traditionally been applied for:
- Nervousness and inner restlessness
- Difficulty falling asleep and mild sleep disturbances
- Digestive complaints such as bloating and stomach cramps
- Anxiety and stress-related complaints
- Cold symptoms and fever (as a diaphoretic tea)
Mechanism of Action
The calming effect of lemon balm is primarily explained by its interaction with the GABA system in the brain. Certain constituents, particularly rosmarinic acid, inhibit the enzyme GABA-transaminase, which breaks down the relaxation-promoting neurotransmitter GABA (gamma-aminobutyric acid). This mechanism allows GABA to remain active longer, resulting in a sedative, anxiolytic effect. In addition, studies suggest that lemon balm extracts can positively influence mood and improve cognitive performance under stress conditions.
Medical Applications
Sleep and Relaxation
Lemon balm is frequently combined with valerian in preparations designed to promote sleep. Clinical studies show that lemon balm preparations can reduce the time it takes to fall asleep and improve overall sleep quality.
Anxiety and Stress Reduction
Several controlled studies have demonstrated that standardized lemon balm extracts can alleviate anxiety symptoms and improve mood. In one study with healthy volunteers, a lemon balm extract increased self-rated calmness while also boosting alertness.
Digestive Complaints
As a carminative (reduces gas) and spasmolytic (relieves cramps), lemon balm is suitable as a supportive treatment for functional gastrointestinal complaints. It is an ingredient in various herbal digestive tonics.
Cognitive Function
Preliminary studies suggest that lemon balm may improve memory performance and concentration, particularly in older individuals. This effect is attributed to inhibition of the enzyme acetylcholinesterase by plant compounds.
Antiviral Activity
Laboratory studies confirm antiviral activity of lemon balm leaf extracts against herpes simplex viruses (HSV-1 and HSV-2). Corresponding creams containing lemon balm extract are approved for the topical treatment of cold sores (herpes labialis).
Forms of Administration and Dosage
Lemon balm is available in various forms:
- Tea: 1.5 to 4.5 g of dried lemon balm leaves per cup, 2 to 3 times daily.
- Tincture / liquid extract: Dosage according to manufacturer instructions.
- Capsules / tablets: Standardized extracts, typically 300 to 600 mg per daily dose in clinical studies.
- Essential oil: For aromatherapy or as a bath additive; not for internal use.
- Topical preparations: Creams or ointments for external application to cold sores.
The optimal dosage may vary depending on the preparation and intended use. Consultation with a pharmacist or physician is recommended, especially for long-term use.
Safety and Side Effects
Lemon balm is considered well tolerated when used short-term and as directed. Possible side effects are rare and include:
- Gastrointestinal discomfort at high doses
- Drowsiness, especially in combination with other sedatives
- Allergic reactions (very rare)
Caution is advised when taking thyroid medications, as lemon balm may influence thyroid function. Interactions with sleeping aids and sedatives are also possible. Pregnant and breastfeeding women should consult a physician before use.
References
- European Medicines Agency (EMA) - Committee on Herbal Medicinal Products (HMPC): Community herbal monograph on Melissa officinalis L., folium. EMA/HMPC/196746/2012.
- Kennedy DO, Wake G, Savelev S, et al.: Modulation of mood and cognitive performance following acute administration of single doses of Melissa officinalis (lemon balm) with human CNS nicotinic and muscarinic receptor-binding properties. Neuropsychopharmacology. 2003;28(10):1871-1881.
- Koytchev R, Alken RG, Dundarov S: Balm mint extract (Lo-701) for topical treatment of recurring herpes labialis. Phytomedicine. 1999;6(4):225-230.
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