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CASTANOPSIS CUSPIDATA BARK EXTRACT.

Valuable / SKIN CONDITIONING

A potent botanical extract derived from the Japanese Chinquapin tree, valued for its high concentration of polyphenols and tannins. It functions as a multifunctional skin-restoring agent that simultaneously targets structural integrity, oxidative stress, and pigment regulation.

Antioxidant Anti-elastase Skin conditioning Brightening

Science

This extract operates through a four-tiered approach: it protects elastin from enzymatic breakdown via anti-elastase activity, prevents glycation-induced stiffness, neutralizes reactive oxygen species through its gallic acid content, and modulates melanogenesis by inhibiting tyrosinase and the MITF pathway.


Research

High confidence
Effective range 0.001–0.1%
Optimal

0.1%

Key findings

  1. 01 Achieved >80% inhibition of elastase activity, indicating significant preservation of dermal elasticity and wrinkle prevention.
  2. 02 Isolated ethyl gallate within the extract effectively suppressed melanin production by downregulating key genetic markers without compromising cell viability.

Transparency

Commonly dusted
Min. effective
0.05%
Red flag below
0.01%

Because it is an exotic botanical, many brands include it at 'label-claim' levels (below 0.01%). However, clinical data suggests that concentrations near 0.1% are required to unlock its potent anti-elastase and skin-firming benefits.


The Formula

Solubility
Water
Optimal pH 4.5 – 6.5
0 7 14

Stability

Highly stable in water-based systems but sensitive to temperatures exceeding 40°C. Due to its tannin profile, it is prone to oxidation and discoloration if exposed to prolonged UV light.

Synergies

  • Vitamin C
  • Hyaluronic Acid
  • Niacinamide

Conflicts

  • Iron salts
  • Strong oxidizing agents
  • Highly alkaline formulations (pH > 8.0)

Safety

CIR Status
Not reviewed
Pregnancy
Safe
Sensitization risk Low

Recognized for its long history of use in East Asian traditional medicine; shows no evidence of cytotoxicity or systemic irritation at cosmetic usage levels.


Your Skin

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

Our Assessment

Valuable

An exceptional botanical for precision aging-well protocols, offering scientifically-backed protection against elasticity loss and oxidative damage.


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