Science
Mechanism of Action
The active components of Glycine Max Leaf Cell Extract, including phenolic acids, flavonoids, and isoflavones like genistein, exert their effects through multiple pathways. It exhibits significant antioxidant activity by scavenging free radicals, as evidenced by DPPH radical scavenging, and increasing the intracellular GSH/GSSG ratio. As an anti-inflammatory agent, it inhibits nitric oxide and prostaglandin E2 synthesis, reduces COX-2 gene expression, and decreases inflammatory cytokine (TNF-α, IL-6, IL-1β) production. Isoflavones can bind to intracellular estrogen receptors in skin fibroblasts, promoting collagen synthesis and inhibiting elastase and matrix metalloproteinases (MMPs), thereby improving skin elasticity and mitigating collagen damage. Additionally, it supports skin barrier function by upregulating filaggrin expression and can reduce hyperpigmentation by hindering melanosome transfer, potentially inhibiting UV-induced redness.
Research
Clinical Evidence
Medium-high confidenceN/A
Key findings
- 01 In vitro studies on lipopolysaccharide-stimulated RAW 264.7 macrophages demonstrated potent antioxidant effects, achieving an 80% DPPH radical scavenging rate and 88% reducing power at 5 mg/ml. These studies also showed significant anti-inflammatory benefits, with up to 86% inhibition of nitric oxide synthesis and decreased inflammatory gene expression (COX-2, TNF-α, IL-6, IL-1β).
- 02 Ethanol extracts of soybean leaves exhibited 5–61% radical scavenging activity and ferric-reducing anti-oxidant power. They also dose-dependently reduced nitric oxide and prostaglandin E2 production in lipopolysaccharide-treated RAW 264.7 macrophages at concentrations ranging from 62.5–500 μg/mL.
- 03 A related extract of Glycine soja (wild soybean) leaf and stem ameliorated atopic dermatitis-like skin inflammation in a mouse model by reducing scratching, dermatitis scores, transepidermal water loss, and epidermal thickness. This was linked to downregulated inflammatory gene markers and upregulated filaggrin expression via JAK/STAT signaling inhibition.
- 04 Isoflavone-enriched soybean leaf extract significantly counteracted the reduction in collagen fibers' relative optical density and dermal thickness in ovariectomized rats in a dose-dependent manner, suggesting efficacy in mitigating skin aging and promoting tissue damage recovery.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Optimal extraction of the active phenolic content and flavonoids from soybean leaves is achieved using hydro-alcoholic solutions (e.g., 70% methanol, 70% ethanol, 88% ethanol at 59 °C). The active components, such as polyphenols and isoflavones, can be prone to instability, requiring careful formulation strategies to maintain efficacy.
Conflicts
- Not recommended for individuals with melasma, as soy is a phytoestrogen and melasma is often estrogen-mediated.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that the available data are insufficient to make a determination that Glycine Max (Soybean) Leaf Cell Extract is safe under the intended conditions of use in cosmetic formulations. No specific maximum concentration for 'Glycine Max Leaf Cell Extract' was provided for safety assessment. However, for a related ingredient, 'Glycine Soja (Soybean) Seed Extract', a maximum use concentration of 2% in face and neck products was reported, for which the Panel requested sensitization data.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While Glycine Max Leaf Cell Extract demonstrates compelling in vitro and animal model efficacy across antioxidant, anti-inflammatory, and anti-aging pathways, the Cosmetic Ingredient Review (CIR) Expert Panel has deemed the available data insufficient for a comprehensive safety determination in cosmetic applications.
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