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Moumoujus

QUERCUS PUBESCENS LEAF/STEM EXTRACT.

Valuable / ANTIOXIDANT

Quercus pubescens Leaf/Stem Extract is a botanical ingredient derived from the pubescent oak, recognized primarily for its potent antioxidant capabilities. It actively scavenges free radicals and chelates metal ions, thereby protecting skin from oxidative damage. The extract also demonstrates potential anti-inflammatory, antimicrobial, and astringent properties, contributing to skin health and resilience.

Summary

Antioxidant Anti-inflammatory Antimicrobial Astringent Wound healing Tyrosinase inhibitor

Science

Mechanism of Action

This extract functions primarily as an antioxidant by inhibiting reactions promoted by oxygen and preventing ingredient deterioration through radical scavenging and iron chelation. Its richness in polyphenols, including flavonoids, tannins, and proanthocyanidins, underpins its protective effects against oxidative stress. Extracts from *Quercus* species generally exhibit anti-inflammatory and antimicrobial properties. The tannin content may also act as a tyrosinase inhibitor, influencing skin pigmentation, while traditional uses suggest astringent and wound-healing benefits.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 An extract demonstrated significant free radical scavenging and iron chelating activities. A patch test in 19 volunteers indicated it was safe for topical application, suggesting low irritation potential.
  2. 02 Butanol extracts showed activity against *Staphylococcus aureus* biofilm formation, suggesting antimicrobial benefits.
  3. 03 Leaves exhibited superior antioxidant characteristics over other plant parts in various antiradical power assays (DPPH•, •NO, O2•− radicals, FRAP, PRAC), reinforcing the extract's broad-spectrum antioxidant capacity.

Transparency

Dusting Analysis

Not commonly dusted

There is no indication this ingredient is commonly used at sub-efficacious concentrations for marketing purposes.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

While specific CIR, SCCS, or FDA safety status for QUERCUS PUBESCENS LEAF/STEM EXTRACT is not yet established, an in-vivo patch test on an extract from a related species, *Quercus robur*, in 19 volunteers indicated safety for topical use. This suggests a low potential for irritation or sensitization.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Quercus pubescens Leaf/Stem Extract is a valuable ingredient due to its strong antioxidant profile and potential for soothing and antimicrobial benefits, though further direct clinical research on this specific species in human skin is warranted.

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