## Plant Monograph: Kaffir Lime Leaves
**Name of plant:**
Kaffir Lime Leaves
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
No traditional Carmina Gadelica invocation is recorded for kaffir lime. In Southeast Asian tradition, the aromatic leaves are associated with purification, freshness, and cleansing of both body and dwelling.
**Family:**
Rutaceae
**Genus and species:**
*Citrus hystrix* DC.
**Other names:**
* Makrut lime (preferred modern name)
* Thai lime
* Leech lime
* Mauritius papeda
* Combava
* Makrut
* Kaffir lime (older common name)
**Brief introduction:**
Makrut lime is a small thorny citrus tree native to tropical Southeast Asia. Its distinctive double-lobed leaves possess an intense citrus fragrance highly valued in Thai, Cambodian, Indonesian, and Lao cuisine. Beyond culinary uses, the leaves and peel have a long history in traditional medicine, household cleansing, ritual purification, and aromatic preparations.
**Traditional uses:**
* Digestive tonic and aid after heavy meals
* Aromatic bath ingredient
* Hair and scalp cleanser
* Household deodorizer and purifier
* Traditional remedy for colds and congestion
**Historical use:**
* Leaves added to herbal steam baths in Thailand
* Used in traditional Indonesian jamu preparations
* Included in ceremonial cleansing rituals
* Employed as an insect repellent in homes
* Used in folk medicine for stomach complaints and fevers
**Parts used and method of use:**
* Leaves
* Fruit peel
Used as:
* Herbal infusion
* Decoction
* Aromatic steam inhalation
* Bath additive
**Use in healing (modern herbal practice):**
* Digestive support
* Mild antimicrobial applications
* Aromatic stress relief
* Respiratory support through inhalation
* Skin and scalp cleansing formulations
**Pharmacology and biochemistry:**
* Citronellal
* Limonene
* β-Pinene
Mechanisms:
* Essential oils exhibit antimicrobial activity
* Volatile compounds may reduce microbial growth on skin surfaces
* Aromatic compounds may support relaxation through olfactory pathways
**Overall profile:**
Makrut lime leaves are primarily an aromatic herb with mild digestive, antimicrobial, and respiratory-supportive properties. Their greatest value lies in culinary use, aromatherapy, and traditional cleansing applications rather than as a potent medicinal herb.
**Common dosage:**
* Infusion: 2–4 fresh leaves per cup of hot water
* Dried leaf tea: 1–2 g per cup, up to 3 times daily
* Steam inhalation: 5–10 crushed leaves in hot water
* Bath preparation: handful of leaves infused in bathwater
**Safety factors (including side effects):**
* Generally regarded as safe when used as food
* Essential oil may irritate sensitive skin
* Citrus allergies may occur in susceptible individuals
* Phototoxicity is possible from concentrated peel oils
* Excessive use of essential oil may cause skin sensitivity
**First aid / adverse reaction response:**
* Skin irritation: Wash area thoroughly and discontinue use
* Allergic rash: Stop use and seek medical advice if severe
* Eye exposure to essential oil: Flush with water for 15 minutes
* Accidental excessive ingestion of oil: Contact poison control or seek medical care
**Drug interactions:**
* No significant interactions documented for culinary use
* Theoretical interaction with photosensitizing medications
* Essential oils may enhance skin sensitivity when combined with topical agents
* Use concentrated extracts cautiously alongside prescription medications
**Horticultural requirements:**
* USDA / Canadian zone: 9–11 (container culture elsewhere)
* Soil pH: 5.5–7.0
* Light requirements: Full sun
* Moisture: Moderate, well-drained soil
**Other notes (growth habit, harvest timing, etc.):**
* Small evergreen thorny tree
* Flowers in warm seasons with fragrant white blossoms
* Leaves harvested throughout the growing season
* Native to tropical Southeast Asia
* Propagated by seed, grafting, or cuttings
**Sampling of clinical reports / studies:**
* Laboratory studies demonstrate antimicrobial effects of leaf essential oils
* Pharmacological investigations identify citronellal as a major bioactive constituent
* Phytochemical studies document abundant volatile terpenes
* Ethnobotanical surveys confirm extensive traditional medicinal and culinary use throughout Southeast Asia
* Overall assessment of evidence: Moderate evidence supports antimicrobial and aromatic uses; limited clinical evidence exists for specific therapeutic applications.
Educational Use Only: The information presented on this page is provided for educational, historical, and informational purposes only. ArdNemeton na Tuatha and Bhùth Draoi do not provide medical advice. Always consult your physician and pharmacist before using any herb, mushroom, supplement, or botanical product for medicinal purposes. Traditional uses described herein do not constitute medical claims.