Science
Mechanism of Action
This ingredient operates by leveraging its high content of antioxidants, such as aspalathin and nothofagin, alongside other polyphenols. It actively neutralizes reactive oxygen species (ROS) and enhances the skin's natural ROS detoxification enzymes, thereby safeguarding skin cells from oxidative stress induced by factors like UV radiation and pollution. Furthermore, it exhibits anti-inflammatory effects, effectively calming irritation and preventing the initiation of inflammatory responses. As a humectant, it helps to retain moisture by minimizing transepidermal water loss and facilitating hydration of the stratum corneum, promoting smoother skin. Its antimicrobial qualities assist in managing acne and minor skin irritations. Enriched with minerals like zinc and magnesium, it supports the skin's regenerative processes and natural healing. It also aids in homogenizing skin tone by diminishing redness and pigmentation and stimulates cellular renewal for a refined complexion, while supporting collagen synthesis to improve skin elasticity and firmness.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Demonstrated cytoprotective effects by significantly reducing apoptosis of UVB-irradiated cells and elevating ATP levels, indicating protection against UVB-induced oxidative stress and toxicity. However, concentrations above 0.01% (100 µg/mL) of specific chalcone derivatives from Aspalathus linearis elicited high oxidative damage.
- 02 Exhibits notable antioxidant properties.
- 03 Effective for preventing mild skin and hair disorders. A preferred formulation range for optimal efficacy is 0.05-0.3%.
- 04 Commonly incorporated into cosmetic formulations.
Transparency
Dusting Analysis
While 0.05% to 0.3% is identified as the preferred range for general efficacy, Aspalathus Linearis Water is often formulated at higher concentrations, typically between 1% and 3%. This suggests potential overuse beyond what is empirically indicated as optimal for broad benefits.
The Formula
Formulation
Stability
To preserve its antioxidant potency, Aspalathus Linearis Water should be stored in opaque, air-tight containers, protecting it from light and air exposure.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has not formally assessed Aspalathus Linearis Water. Nevertheless, European Cosmetics Regulation recognizes rooibos extract as safe for cosmetic use. It generally exhibits an excellent safety profile and is well-tolerated, with a low incidence of severe allergic reactions. However, mild individual sensitivities such as itching or irritation may occur, particularly in very sensitive individuals. It is prudent to note that specific chalcone derivatives from Aspalathus linearis have shown to cause significant oxidative damage to human skin cells at concentrations above 0.01% (100 µg/mL).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Aspalathus Linearis Water is a valuable, multifunctional ingredient that provides comprehensive antioxidant defense, anti-inflammatory benefits, and hydration, making it suitable for a wide array of skin types and concerns.
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References
Sources