Science
Mechanism of Action
Glycine Soja Hull exerts its effects primarily through two pathways. Mechanically, it functions as a physical exfoliant, helping to slough off superficial dead skin cells, leading to a smoother skin texture. Biochemically, it is abundant in polyphenols, including isoflavones like daidzein and genistein. These compounds are powerful antioxidants that neutralize free radicals, thereby mitigating oxidative stress and its associated skin damage.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Research indicates that soybean hull is a significant source of polyphenols, demonstrating antioxidant activity. An alkaline hydrolysis process applied to soybean hull yielded a total phenolic content of 0.72 g gallic acid equivalents per 100 g, alongside an antioxidant activity measured at 2.17 mmoles of Trolox equivalents.
Transparency
Dusting Analysis
As a primary physical exfoliant, Glycine Soja Hull is typically incorporated into formulations at concentrations sufficient to provide its intended abrasive action, rather than being included in trace amounts for marketing claims.
The Formula
Formulation
Stability
The beneficial polyphenols within soybean hull are extractable in water. Additionally, certain enzymes isolated from soybean hulls have shown stability across a broad pH range of 3.0 to 10.0.
Conflicts
- This ingredient may exhibit urease activity, which could impact formulations containing urea. However, heat treatment effectively deactivates this enzyme.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed Glycine Soja (Soybean) Hull, along with other soy-derived ingredients, as safe for use in cosmetic formulations under current practices. Comprehensive studies have shown no evidence of skin irritation or allergic reactions in either animal or human subjects from the cosmetic application of soy ingredients. While soy is a recognized food allergen, dermal exposure to water-soluble soy components is generally not expected to elicit allergic responses due to minimal skin penetration. It is important to note that a caution regarding phytoestrogenic effects and melasma has been associated with 'Glycine Soja (Soybean) Seed Extract', but this specific concern is not directly attributed to Glycine Soja (Soybean) Hull.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Glycine Soja Hull is a valuable ingredient, safely offering both physical exfoliation for smoother skin and antioxidant benefits from its rich polyphenol content.
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References
Sources