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CRYPTOMERIA JAPONICA BRANCH/LEAF OIL.

Valuable / FRAGRANCE

A botanical essential oil derived from the Japanese Cedar, prized for its ability to recalibrate the skin's microbiome and reinforce the physical moisture barrier. It serves as a multifunctional bioactive agent that balances oil production while providing robust antioxidant protection against environmental stressors.

Antimicrobial Anti-inflammatory Antioxidant Skin-conditioning Fragrance

Science

This oil utilizes a complex profile of terpenes and phenolic compounds—specifically alpha-pinene and thymol—to exert antimicrobial effects against acne-causing pathogens. It functions as a natural anti-inflammatory by suppressing pro-inflammatory cytokines and nitric oxide production, effectively down-regulating the skin's stress response while neutralizing free radicals.


Research

High confidence
Effective range 0.016–1%
Optimal

0.5%

Key findings

  1. 01 Demonstrated significant growth inhibition of P. acnes and S. epidermidis at concentrations as low as 0.016% v/v.
  2. 02 In vitro data shows dose-dependent reduction of inflammatory mediators and induction of cellular repair mechanisms.
  3. 03 Exhibited broad-spectrum antimicrobial activity against 15 different bacterial genera.

Transparency

Commonly dusted
Min. effective
0.016%
Red flag below
0.01%

Because this ingredient is effective at ultra-low concentrations (0.016%), brands often include it at 'label-only' levels below 0.01% to claim botanical benefits without providing therapeutic antimicrobial or anti-inflammatory activity.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Highly volatile and sensitive to photo-oxidation; requires airtight, UV-protective packaging to maintain its terpene integrity. Nanotechnology delivery systems are often used to enhance its stability in aqueous formulas.

Synergies

  • Salicylic Acid
  • Niacinamide
  • Squalane

Safety

CIR Status
Not reviewed
Max tested
1%
Sensitization risk Moderate

While generally well-tolerated, its status as an essential oil means it contains natural allergens like limonene, which may cause sensitivity in reactive skin types. Adherence to the 1.0% limit in leave-on products is recommended.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An exceptional botanical bioactive for acne-prone and stressed skin, provided it is formulated at therapeutic levels and protected from oxidation.


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