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Moumoujus

SODIUM BETA-SITOSTERYL SULFATE.

Questionable / SKIN CONDITIONING

SODIUM BETA-SITOSTERYL SULFATE is primarily recognized as a skin conditioning agent, designed to enhance skin health. It works to improve hydration and reinforce the skin's natural barrier, drawing benefits from its unsulfated counterpart, Beta-sitosterol, which is extensively studied for its skin-revitalizing properties.

Summary

skin conditioning moisturizing barrier support anti-inflammatory antioxidant skin brightening

Science

Mechanism of Action

This ingredient functions by interacting with phospholipid membranes, a key component of the skin barrier. Studies indicate its ability to lower phase transition temperatures, induce specific sterol domains, fluidize membranes, and enhance dispersibility, all of which contribute to improved barrier function and hydration. Its unsulfated analogue, Beta-sitosterol, is known to strengthen and repair the skin barrier, stimulate hyaluronic acid synthesis to boost water binding, facilitate deep hydration via aquaporin channels, and promote filaggrin expression for enhanced moisturization. Additionally, Beta-sitosterol exhibits anti-inflammatory and antioxidant effects, and can inhibit tyrosinase activity, potentially offering skin brightening benefits.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Research highlights its utility in cosmetic and pharmaceutical formulations by demonstrating its capacity to fluidize phospholipid membranes and enhance hydration properties.

Safety

Safety Profile

CIR Status
Insufficient data
Pregnancy
Caution
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) Expert Panel has determined that there is insufficient data to conclude on the safety of SODIUM BETA-SITOSTERYL SULFATE. Notably, sulfates of Beta-sitosterol have been reported to act as abortifacients and spermicides in animal models (e.g., 1-2 µg/d in Dutch-belted rabbits over 16 days) due to estrogenic effects. A specific safety assessment for topical cosmetic usage concentrations addressing these reproductive concerns is currently unavailable in the provided data, prompting a precautionary 'not safe' designation for use during pregnancy.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

While SODIUM BETA-SITOSTERYL SULFATE offers promising skin conditioning and hydrating benefits through its membrane-modulating properties, its 'insufficient data' CIR status and documented reproductive concerns for its chemical class warrant significant caution, particularly for vulnerable populations like pregnant individuals.

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