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Moumoujus

CAMELLIA SINENSIS SEED OIL.

Valuable CAS 68916-73-4 / HUMECTANT, SKIN CONDITIONING

A nutrient-dense botanical lipid derived from tea seeds, specifically valued for its high concentration of oleic acid and skin-protective polyphenols. It provides a lightweight, non-greasy emollient layer that mirrors the skin's natural sebum while delivering targeted antioxidant defense.

Summary

antioxidant emollient barrier-repair skin-soothing

Science

Mechanism of Action

The oil acts as a bio-mimetic emollient, integrating high levels of oleic and linoleic acids into the stratum corneum to reinforce the hydrolipidic film. It actively repairs the skin barrier by upregulating filaggrin (FLG) expression and modulates inflammatory responses by inhibiting cytokines such as IL-1β and TNF-α via the NF-κB pathway. Additionally, its polyphenolic content and Vitamin E fractions scavenge reactive oxygen species and inhibit MMP-1 enzymes to halt collagen degradation.

Research

Clinical Evidence

High confidence
Effective range 0.01–100%
Optimal

1%

Key findings

  1. 01 A 1% topical formulation demonstrated significant suppression of Trans-Epidermal Water Loss (TEWL) and measurable improvements in human skin barrier integrity.
  2. 02 In vitro analysis at concentrations as low as 0.01% to 0.1% showed a dose-dependent increase in type I procollagen production and successful inhibition of collagen-degrading MMP-1 enzymes.
  3. 03 Pure 100% tea seed oil has been shown to exert antimicrobial activity against common pathogens including S. aureus.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

While in vitro collagen benefits appear at very low levels (0.01%), meaningful barrier repair and TEWL suppression clinically manifest at 1%. Formulas using it at 'claim' levels below 0.1% may be leveraging the name without providing functional lipid replenishment.

The Formula

Formulation

Solubility
Oil
Optimal pH 4.5 – 7
0 7 14

Stability

Highly susceptible to oxidative rancidity due to its unsaturated fatty acid profile; must be stored in airtight, UV-protective packaging. Stability is significantly enhanced when paired with secondary antioxidants like Tocopherol (Vitamin E).

Synergies

  • Vitamin E (Tocopherol)
  • Squalane
  • Ceramides

Conflicts

  • High-heat processing (>60°C)
  • Pro-oxidant metal ions (Iron, Copper)
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
100%
Pregnancy
Safe
Sensitization risk Low

Evaluated by the CIR in 2011 and deemed safe in current cosmetic practices. It is a non-irritating botanical oil suitable for long-term topical use.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptional multi-tasking lipid that provides clinically backed barrier support and collagen protection with a low risk of comedogenicity.

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