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Holy Basil (Ocimum tenuiflorum) — Tulsi, Sacred Basil
Materia Medica
Family: Lamiaceae
Common names: Holy basil, tulsi, sacred basil
Part used: Aerial parts (leaves and flowering tops)
Growth habit: Aromatic perennial or annual herb
Primary tradition: Ayurvedic medicine
Actions & Energetics
Warming and aromatic. Traditional actions include adaptogen, nervine, and mild antimicrobial. The leaves are used for stress support and respiratory comfort. Energetically considered warming and clarifying.
Botanical Description
An aromatic herb with opposite leaves and small white to purple flowers. Several cultivars exist, including green and purple forms. It is widely cultivated in India and other tropical and subtropical regions. The leaves are the primary medicinal and culinary part.
Name Confusion & Look-Alikes
True holy basil is Ocimum tenuiflorum (syn. Ocimum sanctum). It must be distinguished from culinary sweet basil (Ocimum basilicum). The two are related but not interchangeable for traditional Ayurvedic use.
Traditional Indications
Ayurvedic use of the leaves for stress support, respiratory comfort, and as a general tonic. Tulsi is considered a sacred plant in Hindu tradition and is often grown near homes and temples. Culinary use of the leaves is also traditional.
Preparations & Dosage
Infusion of the fresh or dried leaves. Tinctures and standardized extracts are also used. Traditional doses are modest. Culinary use of fresh leaves is common in some regions.
Classical Formulations
Holy basil appears in traditional Ayurvedic formulas for stress support and respiratory health. It is a classic Ayurvedic adaptogen and tonic.
Constituents
Essential oil (including eugenol, rosmarinic acid, and other phenolics), flavonoids, and triterpenes. The aromatic compounds and phenolics are the focus of adaptogenic and antimicrobial research. Content varies with cultivar and growing conditions.
Modern Research
Human and preclinical studies have examined holy basil extracts for stress markers, cognitive function, and metabolic support. Results show modest benefits in some areas. Culinary use is traditional and generally recognized as safe in food amounts.
Adverse Effects
Generally well tolerated. Mild digestive upset may occur in sensitive individuals. The aromatic compounds can cause mild skin sensitivity in rare cases.
Interactions & Contraindications
Theoretical interaction with blood-sugar lowering or anticoagulant medications. Generally safe as a traditional herb and culinary plant. Caution with high-dose extracts if taking related medications.
Pregnancy & Breastfeeding
Culinary amounts are generally regarded as safe. Concentrated medicinal extracts during pregnancy lack sufficient safety data.
Habitat & Cultivation
Native to tropical Asia and widely cultivated in warm climates worldwide. Prefers full sun, warm temperatures, and well-drained soil. Grown as an annual in temperate regions.
Propagation
Propagated by seed or by cuttings. Direct sow after frost danger has passed. Plants grow quickly in warm conditions.
Harvesting & Drying
Leaves and flowering tops are harvested throughout the growing season. Fresh leaves are preferred for culinary use. Dry carefully for tea. Store dried material in airtight containers away from light.
Food Use
Fresh leaves are used in traditional Indian cuisine and as a tea. The plant is both a sacred herb and a culinary ingredient in its native range.
History, Folklore & Spiritual Use
Holy basil is considered a sacred plant in Hindu tradition and is often planted near homes and temples. It is associated with protection, clarity, and spiritual purity. The plant has a long dual history as both medicine and sacred offering.
Materia Medica Summary
Holy Basil (Ocimum tenuiflorum) is an aromatic herb with a long Ayurvedic reputation as an adaptogen and tonic. The leaves are used for stress support and respiratory comfort. Educational information only.