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Moumoujus

SOY STEROL ACETATE.

Valuable / SKIN CONDITIONING, SURFACTANT - EMULSIFYING

Soy Sterol Acetate, a derivative of soy sterols, fortifies the skin's natural barrier by enhancing moisture retention and preventing transepidermal water loss. It plays a role in cellular repair, providing essential building blocks for healthy skin regeneration and recovery from environmental stressors.

Summary

Skin Conditioning Emulsifier Hydrating Skin Repairing Barrier Support

Science

Mechanism of Action

This ingredient functions by creating a protective, moisture-trapping layer on the skin's surface, which significantly improves hydration levels. Furthermore, soy sterols contribute vital components for cell membrane construction, thereby supporting the regeneration of damaged skin cells and fostering the growth of new, healthy cells. This action accelerates the skin's healing processes, aids recovery from UV exposure or environmental harm, and strengthens the skin's inherent defense mechanisms.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Soy Sterol Acetate, as a phytosterol ester, demonstrates robust stability at ambient temperatures. While generally stable, temperatures exceeding 100°C in the presence of oxygen may lead to some oxidation of the phytosterol component. Related plant sterols exhibit high stability across a pH range of 2.8 to 7.5. Ensuring stability during storage involves routine analysis of water content, free fatty acids, and peroxide value.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel deemed the broader phytosterol ingredient group, including Soy Sterol Acetate, safe as used, noting no evidence of genotoxicity, carcinogenicity, or significant estrogenic effects from dermal exposure. While no specific maximum concentration was identified for Soy Sterol Acetate, related PEG Soy Sterols have been safely used up to 2%. It is advised that related PEG Soy Sterols not be applied to compromised skin due to observed systemic toxicity and sensitization risks under such conditions; however, this specific caution is for PEG derivatives and not directly stated for Soy Sterol Acetate. Phytosterols are 'Generally Recognized As Safe' (GRAS) by the FDA for food use, but this status does not directly extend to cosmetic applications of Soy Sterol Acetate.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Soy Sterol Acetate is a valuable conditioning and moisturizing agent, supporting skin barrier integrity and repair, with a good general safety profile, though specific clinical efficacy data for this ester remains limited.

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References

Sources