Boswellia serrata

Among the Mapuche of southern Chile and among immigrant South Asian communities in Argentina, Boswellia serrata is recognized for its oleogum resin used primarily as incense, and locally the resin is also chewed as a breath freshener or taken in warm milk to calm an upset stomach; the resin’s warming, soothing qualities are highlighted in South Asian herbal traditions, while resin inhalation is emphasized by Mapuche practitioners for colds and congestion (Bennett et al., 2021; Ladio and Heusser, 2011; Benzaken et al., 1997). In Indian Ayurvedic practice the bark is decocted for digestive unease and to counter arthritic discomfort, while the resinous exudate of young shoots is traditionally chewed for coughing and gastritis, and a mild resin milk decoction is used to quiet cough and soothe the airways (Kirtikar and Basu, 1935; P. C. M. Singh, 2001; Ravishankar and Kumbhojkar, 2003). In northern Ethiopia and the Horn of Africa, pastoral communities make a warm bark decoction for body aches and rheumatism, and resin dissolved in butter or milk is taken as a nutritive tonic for joint and back pain; these preparations have been recorded in ethnobotanical surveys of Yemane (1978), Hedberg (1993), and in regional health manuals. Boswellia serrata grows today in many warm tropical markets, with its gum resin sold as frankincense and often combined into joint tonics in pharmacies and herbal shops, and scientific studies continue to focus on the resin’s anti-inflammatory compounds.

Practical recipe – a simple South Asian‑style resin milk decoction (kadha). Roughly 1 to 2 grams of dried Boswellia serrata gum resin is gently simmered in 200 milliliters of whole milk for 5 to 8 minutes, then the milk is strained to remove resin fragments and cooled slightly before drinking. Because Boswellia contains powerful boswellic acids that inhibit pro‑inflammatory mediators, this preparation is not recommended for people with known gastrointestinal ulcers or those on anticoagulants such as warfarin, and it should not replace prescribed anti‑inflammatory or cough medicines.

Active constituents that plausibly account for the traditional actions include boswellic acids, which are strongly documented in Boswellia serrata gum resin and have been shown to inhibit 5‑lipoxygenase and other inflammatory pathways, along with essential oils rich in α‑thujene, sabinene, and p‑cymene, which contribute to the resin’s distinct aroma (Shen et al., 2012; Siddiqui et al., 2011; Kaur et al., 2006). Polysaccharide mucilage noted in the gum likely contributes to the soothing, demulcent effect in throat and stomach preparations.

Commercial frankincense products and modern clinical trials on Boswellia serrata resin continue to focus on joint and digestive discomforts, and the tree remains widely cultivated in South Asia and parts of Africa for its resin and bark; ethnobotanical documentation shows that decoctions of bark and resin continue to be prepared in home kitchens and herbal apothecaries, alongside incense burning, across multiple regions.

**Common products:** The primary commercial product derived from *Boswellia serrata* is the oleo-resin known as Indian frankincense or salai. This resin is processed into various grades for industrial and craft applications. Additionally, the species yields an essential oil through steam distillation, primarily utilized in perfumery and aromatherapy. Ground resin and powdered wood are traded as incense materials.

**Industrial and craft applications:** The resin is a traditional and contemporary source of natural incense for religious and cultural ceremonies. The essential oil and resin are incorporated into incense sticks, cones, and powdered blends. The oil is also used in perfumery as a fragrance fixative and in creating aromatic bases for soaps, detergents, and cosmetics. The resin serves as a raw material for varnishes and lacquers. Scientific research utilizes boswellic acids purified from the resin as biochemical tools.

**Food and beverages (non-medicinal):** The oleo-resin and its derived essential oil are used as natural flavoring substances in specific food products and beverages. The essential oil is permitted for use as a flavoring agent by regulatory bodies in the EU and the US. The ground resin is also used as a food flavoring.

**Colorants and tanning:** *Boswellia serrata* resin is not a significant source of natural colorants for dyeing textiles. Its primary use in this category is as a minor component in incense, where it contributes a natural brown color to smoke and ash. Its application in leather tanning is not documented.

**Wood and fiber:** The wood is used for fuel and charcoal production. It is not a major source of commercial timber, pulp, or bast fiber.

**Fragrance and cosmetics:** The essential oil is a key ingredient in high-end perfumery for its warm, resinous, and balsamic odor profile. The oleo-resin is used in solid perfumes, incense blends, and potpourri. Cosmetics utilize both the essential oil and purified extracts for their aromatic properties.

**Properties relevant to use:** The resin's utility in varnishes and lacquers stems from its content of boswellic acids and other triterpenes, which contribute to drying and film-forming properties. Its fragrance is due to a complex mixture of monoterpenes, sesquiterpenes, and diterpenes, with alpha-pinene being a major constituent. The essential oil's solubility in alcohols and fats facilitates its use in fragrances.

**Sustainability and sourcing:** The species is non-timber forest product dependent. Sustainable harvesting is a key concern, as over-exploitation can damage trees. Certification schemes like the FairWild Standard aim to promote ethical and sustainable wild collection practices for frankincense species. The resin is collected from wild and semi-natural stands across its native range in India.

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