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COLLOIDAL GOLD/CAMELLIA SINENSIS LEAF POWDER.

Valuable / ANTIOXIDANT, HUMECTANT, SKIN CONDITIONING, SKIN PROTECTING

This dual-active ingredient synergistically combines the antioxidant and anti-inflammatory properties of Colloidal Gold with the multi-faceted benefits of Camellia Sinensis Leaf Powder, commonly known as Green Tea. Engineered for precision skincare, it targets concerns such as photoaging, hyperpigmentation, moisture loss, and barrier dysfunction, providing a holistic approach to skin revitalization.

Summary

Antioxidant Anti-inflammatory Skin conditioning Humectant Antimicrobial Astringent UV absorber Exfoliating Promotes collagen synthesis Enhances delivery of other actives Brightening

Science

Mechanism of Action

Colloidal Gold acts as a potent antioxidant, actively neutralizing free radicals and exhibiting anti-inflammatory effects to calm skin redness and irritation. It stimulates collagen synthesis, thereby enhancing skin's moisture retention and potentially improving the absorption and efficacy of other active ingredients. Furthermore, it may contribute to skin pH regulation, cell renewal, firmness, and elasticity. Camellia Sinensis Leaf Powder provides robust antioxidant protection against environmental aggressors like pollution and UV radiation. It possesses strong anti-inflammatory qualities, antibacterial properties beneficial for managing sebum and breakouts, and inhibits collagenase enzymes to preserve collagen and elastin integrity. When combined, as seen with Colloidal Gold Camellia Sinensis (CGCS) extract, it significantly inhibits melanin synthesis by downregulating tyrosinase, TRP-1, and TRP-2 via the microphthalmia-associated transcription factor (MITF) pathway, leading to pronounced skin brightening effects.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 A 2% concentration of green tea lotion effectively treated mild-to-moderate acne.
  2. 02 Application of a 6% Camellia Sinensis glycolic leaf extract significantly improved skin moisture (both immediate and long-term) and reduced skin roughness (microrelief) over 15 and 30 days.
  3. 03 Colloidal Gold Camellia Sinensis (CGCS) extract demonstrated superior inhibition of melanin synthesis and tyrosinase activity in vitro, compared to Camellia Sinensis extract alone, indicating strong potential as a skin-whitening agent. It also exhibited robust 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging antioxidant activity.
  4. 04 Acute topical application of Camellia Sinensis Leaf Extract (CSLE) enhanced relaxation and improved skin hydration, barrier function, and rejuvenation. Long-term CSLE use resulted in improved facial skin health and lowered skin age.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

The catechins within Camellia Sinensis Leaf Extract are highly susceptible to degradation from light and oxygen, demanding meticulous formulation to preserve their biological activity. Colloidal gold, typically a suspension of gold nanoparticles in water, requires specific stabilizers to prevent agglomeration and maintain its beneficial properties.

Synergies

  • The combination of Colloidal Gold with Camellia Sinensis provides a synergistic enhancement, particularly in antioxidant activity and anti-melanogenesis effects, surpassing the efficacy of Camellia Sinensis extract alone.

Conflicts

  • Formulation requires careful protection of Camellia Sinensis components from light and oxygen.
  • Colloidal gold's surface functionalization can make it challenging to displace existing strong ligands with weaker ones during formulation.

Safety

Safety Profile

CIR Status
Insufficient data
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Camellia Sinensis Leaf Extract is safe for use up to 0.86% in leave-on products and 1% in rinse-off formulations. However, for Camellia Sinensis Leaf Powder at a 50% concentration, the CIR reported insufficient data for safety assessment. Colloidal Gold has not been formally assessed by the CIR. While generally considered safe for topical application with studies showing spherical gold particles to be non-toxic to human skin cells, the Scientific Committee on Consumer Safety (SCCS) of the EU requires specific testing information for nanomaterial ingredients to evaluate potential adverse effects. Individuals with known gold allergies or highly sensitive skin are advised to perform a patch test before widespread use. Camellia Sinensis Leaf Extract typically presents no known side effects, though sensitive individuals may wish to consult a doctor.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

This ingredient offers valuable multi-functional benefits, including significant antioxidant, anti-inflammatory, and brightening capabilities, alongside enhanced skin hydration and collagen support for a diverse range of skin concerns.

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