Science
Mechanism of Action
This extract contains key bioactive compounds, including rosmarinic acid, flavonoids, phenolic acids, and diterpenes. It functions as a powerful antioxidant by neutralizing free radicals, thereby mitigating oxidative stress and preventing premature cellular aging. Its anti-inflammatory action is mediated through the inhibition of inflammatory markers such as metalloproteinase-9 (MMP-9) and the downregulation of IL-1β and TNF-α, effectively soothing irritated skin. Furthermore, it exhibits antimicrobial and antibacterial effects, aiding in the prevention of breakouts. The extract also contributes to improved skin tone and elasticity through its toning and astringent qualities, with some evidence suggesting it can stimulate cell proliferation.
Research
Clinical Evidence
Medium confidence0.2%
Key findings
- 01 General Rosmarinus Officinalis Extract provides broad benefits, including antioxidant, anti-inflammatory, antibacterial, toning, and astringent properties, demonstrated to be safe and well-tolerated across a concentration range of 0.2-5%.
- 02 Optimal moisturizing and antioxidant benefits, along with improved skin barrier strength, deep hydration, restored elasticity, and protection against environmental influences, have been observed with general Rosmarinus Officinalis Extract at concentrations of 2-5%.
- 03 Specifically for Rosmarinus Officinalis Flower Extract, safety in leave-on products is established at concentrations of ≤0.2%, provided the formulation is non-sensitizing.
Transparency
Dusting Analysis
While general Rosmarinus Officinalis Extract shows optimal results for moisturizing and antioxidant benefits at concentrations between 2-5%, the specific Rosmarinus Officinalis Flower Extract has a strict safety limit of ≤0.2% in leave-on products as determined by CIR. Formulating with the flower extract above 0.2% in leave-on applications, or implying the full spectrum of high-concentration general rosemary extract benefits from formulations adhering to the flower extract's restricted level, would constitute dusting.
The Formula
Formulation
Stability
Optimal stability for Rosmarinus Officinalis Extract is observed within a pH range of 4.5-5.5. This extract is typically obtained via solvent extraction using water or alcohol.
Conflicts
- High concentrations or combinations with other potentially sensitizing botanical or fragrance ingredients may elevate the risk of skin sensitivity or sensitization.
Safety
Safety Profile
The CIR Expert Panel concluded that Rosmarinus Officinalis Flower Extract is safe in leave-on products at concentrations ≤0.2%, and safe in rinse-off products, provided formulations are non-sensitizing. Manufacturers must be vigilant regarding constituents of concern and avoid levels that could pose a sensitization risk, particularly when combined with other botanicals or fragrance ingredients.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Rosmarinus Officinalis Flower Extract offers valuable antioxidant and anti-inflammatory benefits; however, its precise application in leave-on products is strictly limited to ≤0.2% to ensure safety and mitigate sensitization potential.
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