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RAHNELLA/SOY PROTEIN FERMENT.

Valuable / SKIN CONDITIONING

Rahnella/Soy Protein Ferment is a bio-fermented active ingredient derived from soy protein, processed using Rahnella bacteria. This innovative fermentation enhances the bioactivity of soy, yielding a multi-functional compound that conditions the skin while offering a spectrum of advanced dermal benefits. It is engineered to support skin health, targeting issues from pigmentation to environmental stressors.

Summary

Antioxidant Skin-Conditioning Agent Anti-aging Skin-whitening Photoprotective Anti-inflammatory Microbiome balancing

Science

Mechanism of Action

This ferment functions primarily as a skin conditioning agent. Its mechanism involves soy-derived serine protease inhibitors that mitigate skin pigmentation by interfering with protease-activated receptor-2 (PAR-2) mediated melanosome uptake by keratinocytes. It demonstrates anti-wrinkle efficacy by inhibiting elastase activity, thereby preserving skin elasticity. Furthermore, it defends against UV-induced damage through increased procollagen synthesis and a reduction in the pro-inflammatory cytokine TNF-α within dermal fibroblasts and keratinocytes. The ferment also contributes to a balanced skin microbiome, reduces redness, addresses acne and sunburn, helps restore skin elasticity, regulates skin pH, and provides comprehensive antioxidant, anti-aging, skin-whitening, and photoprotective actions. The fermentation process itself minimizes potential allergenic components of soy by degrading large proteins into smaller polypeptides and converting saponins into more bioactive forms.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Rahnella/Soy Protein Ferment is not considered a 'dusting' ingredient due to its well-documented and multi-faceted mechanisms of action, largely attributed to fermented soy products in general. Its benefits span from skin conditioning and pigmentation reduction to anti-aging and photoprotection, supported by mechanistic understanding rather than solely anecdotal evidence.

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 7
0 7 14

Stability

This ingredient exhibits good stability within a pH range of 3.0 to 7.0, consistent with the acidic conditions often utilized in its fermentation process. Optimal bacterial activity and protein enrichment occur around pH 3, while reduced immunoreactivity for fermented soy protein isolates has been observed between pH 4.0-5.0. Its water solubility and stability across this broad pH range make it versatile for various cosmetic formulations, including those with acidic profiles.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

While 'Rahnella/Soy Protein Ferment' specifically has not been reviewed by the Cosmetic Ingredient Review (CIR) Expert Panel, numerous other soy-derived ingredients have been deemed safe in cosmetics. For instance, 'Glycine Soja (Soybean) Seed Extract' had data requested at a maximum use concentration of 2% in leave-on products. The EWG Skin Deep database rates Rahnella/Soy Protein Ferment with a 'LOW' concern for cancer, allergies & immunotoxicity, developmental and reproductive toxicity, and use restrictions, further supported by the fermentation process which is known to reduce the allergenic potential of soybeans.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Rahnella/Soy Protein Ferment is a valuable, multi-functional ingredient offering significant benefits across all skin types, including anti-aging, brightening, and protective properties, with a low sensitization risk.

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