Herbs (Global Traditional) · Ayurveda
Devadaru (Cedrus deodara) (Cedrus deodara)
Moderate Evidencebotanical
Hermetica Superfood Encyclopedia
Cedrus deodara (Devadaru) is an Ayurvedic medicinal plant containing bioactive compounds like cedrol and himachalol that demonstrate immunomodulatory and antimicrobial activities. The essential oil and extracts modulate immune cell function and exhibit anti-parasitic effects against Leishmania promastigotes.
Devadaru is the heartwood of Cedrus deodara (Himalayan Cedar), a tall evergreen coniferous tree native to the western Himalayas. The bioactive material is extracted from the wood using solvents like benzene, chloroform, ethyl acetate, or methanol, with benzene extraction yielding 11.79% and standardization targeting markers like linalool (1.29%).
No human clinical trials, RCTs, or meta-analyses have been conducted on Devadaru. Research is limited to in vitro studies, including one examining antileishmanial activity (IC50 25 μg/ml) and immunomodulation in human peripheral blood mononuclear cells. No PubMed PMIDs were provided for clinical studies as none exist.
No clinically studied dosages in humans are available. In vitro studies used benzene extract at 12.5-200 μg/ml standardized to 1.29% linalool. Traditional preparations and safe human dosages have not been established through clinical research. Consult a healthcare provider before starting any new supplement.
Cedrus deodara is not consumed as a food/nutrient source; it is used as a medicinal herb in Ayurveda, primarily utilizing heartwood, bark, and essential oil. Its pharmacological relevance derives from its bioactive compound profile rather than macronutrient content. **Key Bioactive Compounds:** • **Himachalol** – Major sesquiterpene alcohol in heartwood essential oil (~15–25% of oil composition); responsible for significant anti-inflammatory and antifungal activity. • **β-Himachalene** – Bicyclic sesquiterpene (~20–30% of essential oil); contributes to insecticidal and antimicrobial properties. • **α-Himachalene** – (~10–18% of essential oil); related terpene with synergistic bioactivity. • **Deodarin** – Flavanone (dihydroflavonol) isolated from heartwood; exhibits antioxidant and anti-inflammatory activity. • **Deodarone (Cedranone)** – Sesquiterpenoid ketone present in heartwood; demonstrated antiparasitic and cytotoxic activity in preliminary studies. • **Cedrol** – Sesquiterpene alcohol (~3–8% of essential oil); known sedative and anxiolytic properties; also found in related Cedrus species. • **Cedeodarin** – Dihydroflavonol glycoside from heartwood; antioxidant compound. • **Taxifolin (Dihydroquercetin)** – Flavonoid (~0.1–0.5% of heartwood extract); potent antioxidant with ORAC value significantly higher than many common flavonoids; moderate oral bioavailability (~30–35%). • **Wikstromal** – Lignan isolated from wood; shows anti-inflammatory potential. • **Essential oil total yield:** ~1.5–3.5% from heartwood (steam distillation); ~0.5–1.2% from needles. **Tannins & Phenolics:** • Total phenolic content of methanolic bark extract: ~45–85 mg gallic acid equivalents (GAE)/g dry extract. • Total flavonoid content: ~20–40 mg quercetin equivalents/g dry extract. **Minerals (in bark/wood – trace, not nutritionally significant):** • Calcium, potassium, magnesium, iron detected in trace amounts in ash analysis; not a meaningful dietary source. **Bioavailability Notes:** • Sesquiterpenes (himachalol, himachalenes) are lipophilic with moderate oral bioavailability; enhanced when administered with lipid carriers (taila/oil-based Ayurvedic formulations like Devadarvyadi Taila). • Flavonoids (taxifolin, deodarin) undergo Phase II hepatic metabolism (glucuronidation/sulfation), limiting systemic bioavailability to ~20–35% without formulation enhancement. • Traditional Ayurvedic processing (kwatha/decoction, taila/medicated oil) may improve extraction and absorption of lipophilic terpenoids. • No significant macronutrient (protein, carbohydrate, fat, fiber) or vitamin content relevant to human nutrition.
Cedrus deodara's bioactive compounds including cedrol, himachalol, and atlantone modulate immune function by increasing nitric oxide production in macrophages and reducing IL-10 cytokine levels in CD4+ T cells. The essential oil components disrupt parasitic cell membranes and interfere with cellular respiration pathways. These sesquiterpene compounds also inhibit bacterial cell wall synthesis and protein production.
Current evidence for Cedrus deodara is limited to preliminary in vitro studies. Laboratory research shows anti-parasitic activity against Leishmania promastigotes with IC50 values of 25 μg/ml. Immunomodulatory studies demonstrate a 1.3-fold increase in nitric oxide production (P<0.001) and significant IL-10 reduction in immune cells. No human clinical trials or standardized dosing protocols have been established for therapeutic use.
Safety data for Cedrus deodara supplements is limited due to lack of human studies. Essential oil preparations may cause skin irritation or allergic reactions in sensitive individuals. Potential interactions with immunosuppressive medications are theoretically possible given the immunomodulatory effects. Pregnant and breastfeeding women should avoid use due to insufficient safety data and traditional contraindications in Ayurvedic practice.
