Science
Mechanism of Action
This extract operates through several key pathways: it stimulates the body's natural hyaluronic acid synthesis, significantly boosting skin moisture retention. Functioning as a potent antioxidant and anti-inflammatory agent, it protects skin cells from environmental stressors. Soymilk Extract enhances the production of both collagen and elastin, simultaneously shielding existing elastin fibers from degradation, which visibly reduces sagging and fine lines. By modulating retinoic acid-related genes and inhibiting PAR-2 activation, it contributes to photoprotection, diminished hyperpigmentation, and a more even skin tone. Furthermore, it promotes epidermal thickness and increases the dermal papilla index, supporting the structural rejuvenation of aging skin, while also helping to balance oil production and strengthen the skin's microflora.
Research
Clinical Evidence
High confidence3%
Key findings
- 01 A cream formulation containing soybean extracts at this concentration demonstrated good stability and was linked to significant collagen stimulation in both in vitro and ex vivo studies.
- 02 Topical application of soy extract for two weeks resulted in a notable 21% increase in the dermal papilla index, suggesting an effective rejuvenation of aging skin structure.
- 03 Treatment with soymilk fractions at these precise concentrations exhibited positive effects on procollagen production in UVB-irradiated human dermal fibroblasts and inhibited TNF-α production in HaCaT keratinocytes, indicating distinct anti-aging and anti-inflammatory benefits.
- 04 This range is generally cited as the recommended use level for 'Soybean Extract' in skincare products, indicating broad efficacy across various benefits.
Transparency
Dusting Analysis
While specific soymilk fractions demonstrate biological activity at concentrations as low as 0.001% for targeted effects like procollagen stimulation and anti-inflammatory responses, the recommended use levels for broader skincare benefits typically range from 2% to 10%. This indicates that the ingredient is generally incorporated at functionally effective concentrations in products. Inclusion below 0.001% for general claims of efficacy would be considered insufficient to deliver meaningful results.
The Formula
Formulation
Stability
Soybean Extract exhibits robust acid resistance, maintaining stability at a pH of 2.0. Cream formulations with soybean extracts have shown good stability across a pH range of 4.2 to 7.55, with an optimal range for topical products considered to be 4.5 to 7.2. Soymilk is an aqueous extract, affirming its water solubility. For optimal skincare benefits, non-denatured soybean extracts are preferred.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that most soy-derived ingredients, including Glycine Soja (Soybean) Seed Extract, are safe for use in cosmetics at current concentrations. A Human Repeated Insult Patch Test (HRIPT) conducted on 59 subjects using a 3% concentration of Glycine Soja (Soybean) Seed Extract observed no irritation or sensitization. However, individuals with known soy allergies should exercise caution. Soymilk Extract has been noted to have a moderately high comedogenic rating, suggesting a potential to clog pores, and should be used with discretion by those with acne-prone skin.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Soymilk Extract is a valuable, multifaceted ingredient demonstrating robust clinical efficacy in promoting hydration, combating signs of aging, and improving skin tone, supported by studies across a range of concentrations; however, users with soy allergies or acne-prone skin should consider its specific safety profile.
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References
Sources