Shireesha (Albizia lebbeck)

Albizia lebbeck is an Ayurvedic medicinal tree containing bioactive saponins and flavonoids that exhibit anti-inflammatory and anti-allergic properties. The bark and leaves contain compounds like lebbecagenin and albizin that modulate immune responses and inhibit inflammatory mediators.

Origin & History

Shireesha (Albizia lebbeck) is a deciduous tree native to tropical and subtropical regions of Asia, Australia, and Africa, belonging to the Fabaceae family. The plant's bark, leaves, seeds, and pods are processed through solvent extraction methods using ethanol or water to yield extracts rich in saponins, flavonoids, tannins, alkaloids, and terpenoids.

Historical & Cultural Context

In Ayurveda, Shirisha has been used for over 2,000 years as a Vishagna (anti-toxic) and Tridoshagna (balancer of Vata, Pitta, Kapha doshas) herb. Traditional applications include treating skin disorders, wounds, inflammation, asthma, poisoning, respiratory issues, and allergies.

Health Benefits

• Anti-inflammatory effects demonstrated in preclinical models (evidence: animal studies only)
• Anti-asthmatic and anti-allergic properties shown in laboratory research (evidence: in vitro and animal studies)
• Antimicrobial activity against various pathogens (evidence: laboratory studies only)
• Anti-histaminic and anti-anaphylactic effects (evidence: preclinical investigations)
• Potential antioxidant properties from flavonoid and tannin content (evidence: phytochemical analysis)

How It Works

Albizia lebbeck's saponins, particularly lebbecagenin and albizin, inhibit mast cell degranulation and reduce histamine release, providing anti-allergic effects. The flavonoid compounds suppress pro-inflammatory cytokines like TNF-α and IL-1β through NF-κB pathway inhibition. Additionally, the bark extracts demonstrate antimicrobial activity by disrupting bacterial cell wall synthesis and interfering with fungal membrane integrity.

Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses were identified for Albizia lebbeck. Current research is limited entirely to preclinical studies including in vitro and animal models demonstrating various bioactivities.

Clinical Summary

Current evidence for Albizia lebbeck is limited to preclinical studies, with no published human clinical trials available. Animal studies have shown 40-60% reduction in inflammatory markers and significant bronchodilation in asthma models using 200-400mg/kg doses. Laboratory studies demonstrate antimicrobial activity against Staphylococcus aureus, E. coli, and Candida albicans with MIC values ranging from 50-200 μg/ml. Human studies are needed to establish clinical efficacy and optimal dosing protocols.

Nutritional Profile

Shireesha (Albizia lebbeck) is a medicinal plant used primarily for its bioactive phytochemical constituents rather than conventional macronutrient content. Key bioactive compounds include: Saponins (lebbeckaside, acaciaside; approximately 2-5% in bark and pods), which are among the primary active constituents responsible for anti-allergic and anti-asthmatic effects. Flavonoids including quercetin, kaempferol, and luteolin (approximately 0.3-1.2% in leaf and bark extracts), contributing to anti-inflammatory and antioxidant activity. Tannins (condensed and hydrolyzable; approximately 8-12% in bark), including ellagic acid and gallic acid derivatives. Alkaloids including albizine and macro-carpal compounds (trace amounts, <0.5%). Terpenoids and sterols including β-sitosterol and stigmasterol identified in seed and bark fractions. Crude protein content in seeds is relatively high at approximately 25-32% dry weight, with significant lysine and methionine content. Crude fiber in pods and bark ranges from 15-25% dry weight. Seed fat content is approximately 5-8%, comprising oleic and linoleic acids. Mineral content includes calcium (approximately 1,200-1,500 mg/100g dry bark), potassium (~800 mg/100g), magnesium (~250 mg/100g), and iron (~15-20 mg/100g), though these values are derived from limited analytical studies. Bioavailability note: Saponins may enhance absorption of co-administered compounds but can reduce direct nutrient bioavailability through anti-nutritional effects; traditional decoction preparation (kwatha) likely hydrolyzes some saponin glycosides, potentially improving tolerability. Data is primarily derived from phytochemical screening studies; standardized nutritional analysis for all fractions remains limited.

Preparation & Dosage

No clinically studied dosage ranges are available as human trials have not been conducted. Traditional preparations include decoctions and powders from bark and seeds, but standardized dosing has not been established. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Tulsi, Ashwagandha, Turmeric, Neem, Guduchi

Safety & Interactions

Albizia lebbeck appears generally well-tolerated in traditional use, but comprehensive safety data is lacking. The plant may interact with anticoagulant medications due to potential blood-thinning effects observed in animal studies. Gastrointestinal upset and mild sedation have been reported with high doses in traditional medicine accounts. Pregnant and breastfeeding women should avoid use due to insufficient safety data, and individuals with bleeding disorders should exercise caution.