Science
Mechanism of Action
This extract is rich in active compounds including tannins, terpenes, fatty acids, and phenolic compounds, notably anti-inflammatory flavonoids like quercetin. It primarily functions as an astringent, effectively reducing and constricting skin pores. It delivers significant soothing and calming effects, which helps mitigate redness and irritation. Furthermore, the extract possesses antioxidant properties, defending the skin against environmental damage, and antimicrobial activities crucial for maintaining skin cleanliness and preventing potential infections. Tannins within the extract also contribute to enhancing skin firmness and elasticity, while assisting in the restoration of the skin’s protective barrier.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 When incorporated into skincare formulations at concentrations ranging from 5% to 10%, Quercus Alba Bark Extract has demonstrated efficacy in reducing excess oil secretion, promoting clear skin, enhancing overall skin tone, and delivering a calming and soothing effect. Its astringent and anti-irritant properties are notable.
- 02 In in vitro studies, a minimum inhibition concentration of 100 mg/ml exhibited robust antibacterial effects against both Escherichia coli and Staphylococcus aureus. This bactericidal action occurred without observed cytotoxicity on red blood cells, specifically in the absence of alcohol.
Transparency
Dusting Analysis
The provided research data does not contain information indicating common 'dusting' practices or specific ineffective percentage thresholds for Quercus Alba Bark Extract.
The Formula
Formulation
Stability
For optimal stability and the effective preservation of its bioactive compounds, Quercus Alba Bark Extract should be formulated within a pH range of 4.0 to 6.5. Both pH and ionic strength are critical parameters influencing its integrity during formulation.
Conflicts
- Cast iron vessels (tannins can react with iron, potentially forming toxic complexes)
- Neutral lead acetate (leads to precipitation from solution)
- Ferric chloride (causes the solution to turn a distinct dark-green color)
Safety
Safety Profile
A direct Cosmetic Ingredient Review (CIR) safety assessment for Quercus Alba Bark Extract was not found in the available research. However, the ingredient is used in products manufactured in FDA-registered facilities. EWG Skin Deep rates it with 'low' concern for potential issues such as cancer, allergies & immunotoxicity, and developmental & reproductive toxicity, and it is not listed on their Restricted or Unacceptable Lists. In vitro studies further support its safety profile by showing no cytotoxicity on red blood cells when alcohol is absent.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Quercus Alba Bark Extract is a valuable ingredient, particularly for those with oily and sensitive skin, offering a potent combination of astringent, oil-balancing, soothing, and antimicrobial benefits for enhanced skin clarity and comfort.
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