α-Bisabolol — Levomenol (Sesquiterpene Alcohol · Skin Soothing · Penetration Enhancer)
| Compound | α-Bisabolol (Levomenol) |
| Chemical class | Terpenoid — Sesquiterpene Alcohol (Bisabolane skeleton) |
| CAS | 515-69-5 |
| Primary source | Matricaria chamomilla (German chamomile), Candeia tree (Eremanthus erythropappus, Brazil) |
| Key applications | Skin soothing, anti-inflammatory, wound healing, penetration enhancer, antimicrobial |
| Claim strength | Moderate |
| Typical form | German chamomile essential oil constituent (10–35% α-bisabolol); α-bisabolol isolate (from Candeia) |
| Buy from Herbuno | Chamomile Flower Extract Powder → |
Name origin: From bisabola — an early vernacular name for myrrh-related resins. α-Bisabolol (the (−)-(S) enantiomer) is the naturally occurring, biologically active form. Synthetic bisabolol (racemic ±) and the (+)-(R) enantiomer have reduced activity. “Levomenol” is an alternative INCI name used in cosmetics. Traditional use: German chamomile (Matricaria chamomilla, Babunah in Unani) has been used across European, Middle Eastern, and Asian traditions for over 2,000 years for skin inflammation, wound healing, GI complaints, and anxiety. Bisabolol is a key bioactive alongside chamazulene (the blue pigment responsible for chamomile oil’s characteristic colour and anti-inflammatory activity). Research trajectory: α-Bisabolol has extensive cosmeceutical research and commercial application as a skin-soothing, anti-irritant, and penetration-enhancing agent. Pharmaceutical-grade α-bisabolol is commercially produced from the Brazilian Candeia tree (Eremanthus erythropappus), providing a supply independent of chamomile volatility. Commercial source: Chamomile Flower Extract Powder and Chamomile Liquid Extract from Herbuno provide bisabolol as a constituent of the complete chamomile phytochemical profile. See sourcing options below.
Evidence for Bisabolol Applications
Skin soothing and anti-irritant: α-Bisabolol is one of the most well-validated skin anti-irritant agents in cosmeceutical science. Human clinical studies demonstrate bisabolol reduces erythema from skin irritants, soothes UV-induced erythema, and reduces post-procedure skin sensitivity. It inhibits 5-LOX and reduces prostaglandin E2 in skin cell models. The most extensively documented use case in cosmetics. Claim strength: Moderate (cosmeceutical clinical evidence).
Penetration enhancer: α-Bisabolol disrupts stratum corneum lipid organisation, transiently improving transdermal permeability of co-applied actives. At 0.5–1% in topical formulations, it improves skin penetration of hydrophilic and lipophilic actives by 2–4-fold without causing persistent barrier damage. Used in premium skincare formulations to improve efficacy of co-applied actives. Claim strength: Moderate.
Anti-inflammatory (oral/systemic): Bisabolol inhibits 5-LOX, NF-κB, and reduces mast cell degranulation. In animal models of gastric ulcer, GI inflammation, and arthritis, bisabolol demonstrates significant anti-inflammatory efficacy. Relevant for GI health and systemic anti-inflammatory formulations. Claim strength: Moderate.
Antimicrobial: α-Bisabolol demonstrates activity against S. aureus, C. albicans, and Leishmania species. Anti-biofilm activity is documented. Relevant for oral care and topical antimicrobial formulations. Claim strength: Moderate.
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Dosage & Formulator Specification
Topical cosmeceutical: 0.1–1% α-bisabolol in the finished formulation for skin soothing; 0.5–1% for penetration enhancement applications. Oral supplement (GI anti-inflammatory): no established human dose for isolated bisabolol; chamomile extract at 200–400 mg/day (standardised to apigenin content, with bisabolol as co-constituent) is the standard chamomile supplement specification. Specify (−)-α-bisabolol (natural, (S) enantiomer) on cosmetic or supplement specifications — the racemate has approximately 50% of the anti-inflammatory potency of the natural enantiomer. Natural α-bisabolol from Candeia tree is chemically identical to that in chamomile and more economically produced for high-volume cosmetic use.
Frequently Asked Questions — Bisabolol
Is bisabolol the main active in chamomile?
German chamomile (Matricaria chamomilla) essential oil contains both α-bisabolol (10–35%) and chamazulene (1–15% — the blue-coloured dihydroazulene formed during steam distillation from matricine). Both are anti-inflammatory actives with complementary mechanisms: bisabolol primarily through 5-LOX inhibition and membrane effects; chamazulene primarily through COX-2 inhibition. Chamomile aqueous extracts (teas, tinctures) contain more apigenin (a flavone) and less bisabolol (which is oil-soluble) than the essential oil.
What is the Candeia tree source of bisabolol?
Eremanthus erythropappus (Candeia tree, Brazil) has very high bisabolol content in its wood (up to 40% α-bisabolol in steam-distilled oil) and is the primary industrial production source for cosmetic-grade α-bisabolol globally. This allows large-volume, cost-effective natural bisabolol supply independent of chamomile crop volatility. Sustainable harvesting and IBAMA (Brazilian environmental regulatory) compliance should be verified for Candeia-derived bisabolol sourcing.
Can bisabolol be used to improve bioavailability of other actives in skincare?
Yes — this is one of bisabolol’s most commercially valuable applications. At 0.5–1%, bisabolol transiently disrupts stratum corneum lipid bilayer organisation, increasing permeability for co-applied actives. Particularly effective for improving penetration of hydrophilic actives (vitamin C, niacinamide) that otherwise penetrate poorly through the skin’s lipid barrier. Unlike harsher penetration enhancers (propylene glycol, alcohol), bisabolol improves penetration without significant barrier damage or irritation.
Is synthetic bisabolol equivalent to natural bisabolol for skin applications?
No — the specific enantiomer matters. Natural α-bisabolol is the (−)-(S) enantiomer. Synthetic bisabolol produced by chemical synthesis is typically the racemate (equal (S) and (R) forms). The (+)-(R) enantiomer has significantly lower anti-inflammatory potency. For premium skin-soothing and anti-inflammatory applications, specify natural α-bisabolol ((−)-(S) enantiomer) from chamomile or Candeia tree and verify optical rotation on CoA.
Related compounds: Guaiol, Artabsin, Patchouli Alcohol, Linalool
Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.
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