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Moumoujus

CAREX KOBOMUGI EXTRACT.

Valuable CAS - / SKIN CONDITIONING

A sophisticated botanical bioactive derived from Asian beachgrass, specifically engineered to regulate the skin's internal hormonal triggers for oil production. It bridges the gap between traditional herbal soothing and modern endocrinological skincare by targeting sebum at the molecular level.

Summary

Sebum Regulator Antioxidant Anti-Pollution Skin Conditioning Soothe

Science

Mechanism of Action

This extract utilizes unique polyphenols like Kobochromone A to inhibit the DHRS11 enzyme, effectively blocking the intracellular conversion of inactive hormones into potent androgens that stimulate oil glands. Simultaneously, its stilbenoid profile (such as ε-viniferin) activates SIRT1 longevity genes and neutralizes oxidative stress caused by UV exposure and particulate matter (PM 2.5).

Research

Clinical Evidence

High confidence
Effective range 0.1–5%
Optimal

2.5%

Key findings

  1. 01 Demonstrated DHRS11 inhibition and androgen receptor suppression at concentrations as low as 0.35 μM (Steroids Journal, 2022/2025).
  2. 02 Observed significant protection against UV-B induced cellular damage and fine dust irritation at 100 μg/mL (NIBR, 2024).
  3. 03 Improvement in skin elasticity and tone through SIRT1 activation was validated for hydroxystilbene-rich Carex extracts (Patent DE202018105288U1).

Transparency

Dusting Analysis

Commonly dusted
Min. effective
0.1%
Red flag below
0.05%

Because it is a specialized K-Beauty ingredient with potent efficacy at micro-molar levels, many brands include it at trace amounts for marketing. For biological activity regarding sebum control and SIRT1 activation, a concentration above 0.1% is required.

The Formula

Formulation

Solubility
Both
Optimal pH 4 – 6.5
0 7 14

Stability

The active stilbenoids are sensitive to photo-degradation and alkaline environments (pH > 7.0). Formulas should be packaged in UV-protective, opaque containers.

Synergies

  • Niacinamide
  • Retinoids
  • Ascorbic Acid

Conflicts

  • Strong oxidizing agents
  • High-pH alkaline cleansers
  • Ferric salts

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

Maintains an EWG-equivalent safety score of 1. It is non-hormonal in systemic terms, acting only on local skin enzymes, making it a safer alternative to pharmaceutical anti-androgens.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptional multi-functional ingredient that offers a rare biological pathway for oil control while providing robust protection against modern environmental stressors.

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