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Moumoujus

TORREYA NUCIFERA LEAF EXTRACT.

Valuable / SKIN CONDITIONING - EMOLLIENT

Torreya Nucifera Leaf Extract, derived from the Japanese Torreya tree, is a versatile botanical ingredient demonstrating notable antibacterial efficacy against key skin pathogens. It offers significant anti-inflammatory benefits by modulating pro-inflammatory mediators, and exhibits anti-melanogenic effects through tyrosinase inhibition and pathway interference, contributing to a clearer, more even-toned complexion.

Summary

Skin conditioning Anti-inflammatory Antioxidant Antibacterial Perfuming

Science

Mechanism of Action

This extract operates via multiple mechanisms to support skin health. Its antibacterial action stems from inhibiting the growth of various skin pathogens, including those associated with acne such as *Propionibacterium acnes*. Anti-inflammatory properties are achieved by reducing the secretion of pro-inflammatory cytokines like interleukin-1β (IL-1β), IL-6, nitric oxide (NO), and prostaglandin E2 (PGE2). Furthermore, it reduces melanin content and cellular tyrosinase activity, while also interfering with the mitogen-activated protein kinase (MAPK) signaling pathway by inhibiting p38 and c-Jun N-terminal kinase (JNK) phosphorylation, which collectively contribute to its skin-brightening effects.

Research

Clinical Evidence

High confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Torreya Nucifera Essential Oil (TEO) demonstrated excellent antibacterial activity against a range of skin pathogens, including *Propionibacterium acnes*, *Malassezia furfur*, and *Staphylococcus epidermidis*, within concentrations of 2.5-20.0 μL mL-1.
  2. 02 TEO reduced the LPS-induced secretion of pro-inflammatory mediators (IL-1β, IL-6, NO, and PGE2) in cellular models, indicating potent anti-inflammatory effects.
  3. 03 A hot water extract of Torreya nucifera leaves (TLWE) significantly reduced melanin content and cellular tyrosinase activity in a concentration-dependent manner, showing anti-melanogenic effects at 50, 100, and 200 μg/mL. This was also linked to the inhibition of p38 and JNK phosphorylation in the MAPK signaling pathway.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

The essential oil derived from Torreya nucifera leaves, rich in monoterpenes such as dl-Limonene, δ-3-carene, and α-pinene, is noted for quick absorption without stickiness and has no discernible scent.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

Skin irritation tests for the hot water extract of Torreya nucifera leaves indicate it is harmless to human skin, even at concentrations exceeding 200 μg/mL. Furthermore, the essential oil demonstrated negligible cytotoxicity for human keratinocyte HaCaT cells at concentrations effective for bactericidal activity, suggesting a favorable safety profile.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Torreya Nucifera Leaf Extract is a valuable, multi-functional ingredient, offering scientifically supported antibacterial, anti-inflammatory, and anti-melanogenic benefits with a low irritation potential, making it suitable for a broad range of skin types and concerns.

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References

Sources