Hinoki leaf essential oil (Chamaecyparis obtusa var. obtusa, Cupressaceae leaves + terminal branches steam distillate; same species as Japanese architectural-grade hinoki-wood and hinoki-root but distinct chemotype from foliage) is an elemol + α-terpinyl acetate + γ-eudesmol + bornyl acetate + β-eudesmol sesquiterpene-alcohol + ester-rich Cupressaceae-foliage oil with clean Tisserand & Young profile ("Hazards: None known. Contraindications: None known."). B216 Ch.13 p.615–616 cites Shieh et al 1981 chemistry: elemol 14.8% + α-terpinyl acetate 9.1% + γ-eudesmol 8.3% + bornyl acetate 7.2% + β-eudesmol 6.5% + γ-muurolene 5.7% + α-eudesmol 5.4% + β-cedrene 4.7% + 14 minor constituents 1–4% range. Framework caps default conservative (no T&Y patch data: "No information found" for skin reactions + acute tox + carcinogenicity): adult dermal 5.0% + sensitive 3.0% + pregnancy 5.0% + pediatric cascade + max_oral 700 mg/day. Phototoxicity-NEGATIVE (Cupressaceae foliage, no furocoumarins). CYP2B1 induction in male rat hepatic microsomes (Hiroi 1995) — NOT at clinical drug-interaction level. Closes Mini-Batch 21a contrast trio (hemp latent-oxidation + hibawood pregnancy-contraindicated + hinoki-leaf clean profile). Same-species cross-part chemotype divergence rail (CRITICAL): hinoki-leaf (foliage, this oil — eudesmol+elemol+bornyl-acetate balanced) ≠ hinoki-wood (B216 p.616–617, would be separate entry — α-cadinol 20.5% + T-muurolol 18.4%) ≠ hinoki-root (B216 p.616–617, separate entry — longi-α-nojigiku alcohol 19.7% + α-terpinyl acetate 9.1%) — same species, three plant parts, three radically different chemotypes, paralleling cinnamon-bark vs cinnamon-leaf E&Y rail. Forms back-to-back Cupressaceae same-batch pair with hibawood EO740 (THIS batch 21a) demonstrating intra-family wood-vs-leaf chemotype-and-safety divergence.
Tổng Quan
- Danh pháp khoa học
- Chamaecyparis obtusa (Siebold & Zucc.) Endl. var. obtusa
- Họ thực vật
- Cupressaceae
- Bộ phận dùng
- Leaves and terminal branches
- Phương pháp chiết xuất
- steam_distillation
- Màu sắc
- —
- Phân loại nốt hương
- Nốt Base
- Hương thơm
- —
- Chemotype / Cultivar
- —
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Soft mossy woodland, freshly crushed conifer foliage, warm cedar-like earthiness, gentle green sweetness, forest floor quietude
Rừng rêu mềm mại yên tĩnh, lá tuyết tùng vừa nghiền tươi mát, ấm áp gỗ đất nhẹ nhàng, xanh ngọt dịu dàng, bình lặng nền đất rừng
2–4 giờ
Tên gọi tại Việt Nam
Pha Chế & Hòa Hợp
Forest-derived volatile sesquiterpene alcohols including elemol are associated with reduced salivary cortisol and suppression of sympathetic nervous system activity in controlled shinrin-yoku studies conducted in Chamaecyparis obtusa stands.
Ref: Park BJ, Tsunetsugu Y, Kasetani T, Kagawa T, Miyazaki Y (2010). Physiological effects of shinrin-yoku in 24 forests across Japan. Environmental Health & Preventive Medicine 15:18–26.
Elemol (dominant sesquiterpene alcohol) and monoterpene esters support parasympathetic tone via olfactory–limbic pathway activation; calming properties are consistent with the broader Cupressaceae foliage sesquiterpene alcohol class.
Ref: Miyazaki Y et al (1990). Forest air bathing physiological effects; Tisserand & Young 2014, Ch.13 p.615–616.
Inhalation of Chamaecyparis obtusa volatile phytoncides (sesquiterpene alcohols and monoterpene esters) significantly increased peripheral blood NK cell activity in forest-bathing studies across 24 Japanese sites.
Ref: Park BJ, Tsunetsugu Y, Kasetani T, Kagawa T, Miyazaki Y (2010). Environmental Health & Preventive Medicine 15:18–26.
Diffused sesquiterpene alcohols and monoterpene esters volatilize as phytoncides, replacing environmental odours and providing the clean forest-atmosphere quality characteristic of hinoki-based diffusion applications.
Ref: Tisserand & Young 2014, Ch.13 p.615–616; Miyazaki Y et al (1990).
Elemol and allied sesquiterpene alcohols disrupt bacterial membrane integrity; activity is documented for Cupressaceae sesquiterpene alcohol fractions but specific MIC data for hinoki leaf EO is absent from §13 citations.
Ref: class-extrapolation from hinoki-wood (C. obtusa heartwood, same species — α-cadinol/T-muurolol class); Tisserand & Young 2014, Ch.13 p.615–616
Sesquiterpene alcohols of the eudesmol/elemol class suppress pro-inflammatory mediator synthesis at the local dermal level; effect is mild and inferred from class-wide literature, not hinoki leaf EO–specific in-vivo data.
Ref: class-extrapolation from Cupressaceae sesquiterpene alcohol class; Tisserand & Young 2014, Ch.13 p.615–616
AI-summary
Strongest controlled evidence derives from shinrin-yoku (forest bathing) research: Park et al (2010) measured cortisol, blood pressure, pulse rate, and NK cell activity across 24 Japanese forest sites including hinoki (Chamaecyparis obtusa) stands, finding consistent parasympathetic activation and enhanced innate immune function. Miyazaki et al (1990) established the original physiological paradigm at Chiba University. CRITICAL CAVEAT: both studies document exposure to whole forest air — complex multi-compound phytoncide mixtures — not to isolated hinoki leaf EO. No RCT using isolated hinoki leaf EO has been located in §13 citations. Ratings are class-extrapolations from shinrin-yoku and Cupressaceae literature. CYP2B1 induction (Hiroi et al 1995, rats) is explicitly rated by T&Y as not reaching clinical drug-interaction significance.
NarrativeTâm trạng: Calming, Grounding
Chakra
root
Ngũ hành
kim
| Phương pháp | Liều lượng | Ghi chú |
|---|---|---|
| Diffusion | 3–5 drops per 100 ml water in ultrasonic diffuser | Primary recommended modality — closest analogue to shinrin-yoku atmospheric exposure. Diffuse 30–60 min intervals with breaks. Suitable for meditation, study, or evening wind-down environments. |
| Topical massage | 1–2% in carrier oil (1–2 drops per 5 ml carrier) | Safe for general topical use at standard dilution; clean profile per T&Y Ch.13 (no known skin sensitization, not phototoxic). Suitable for full-body or back massage. Avoid eye area. |
| Inhalation — personal inhaler | 4–6 drops on cotton inhaler wick | Portable forest-bathing analogue for acute stress or anxiety. Inhale 2–3 slow breaths per session, up to 3 sessions per day. Well-suited for workplace or travel use. |
| Bath | 4–6 drops pre-dispersed in 1 tsp bath dispersant or full-fat milk | Must pre-dilute before adding to water to prevent neat-oil skin contact. Warm bath (not hot); soak 15–20 min. Preferred for evening tension-relief and muscle recovery. |
| Skincare blend | 0.5–1% in facial carrier (0.5–1 drop per 5 ml) | Low sensitization risk suits sensitive-skin facial formulations. Elemol contributes mild soothing properties. Not phototoxic — safe for morning skincare. Pairs with jojoba or rosehip. |
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