Rosemary (Rosmarinus officinalis) Leaf Extract offers a rich array of phenolic compounds — chiefly carnosic acid, carnosol, and rosmarinic acid — known for their potent antioxidant activity. These molecules mitigate oxidative stress induced by UV radiation and environmental pollutants, thereby helping to preserve collagen integrity and counter premature aging.
In haircare, this glycerin-based rosemary extract fosters scalp and hair health through its anti-inflammatory, astringent, and antimicrobial properties. It supports scalp clarity and comfort by reducing irritation and regulating sebum production, while enhancing overall manageability and shine. Importantly, using glycerin as a solvent ensures compatibility with water-based formulas, promoting easy integration into toners, leave-on conditioners, and scalp treatments without reliance on alcohol or volatile solvents.
Quick Insights
Ingredient Rating:
GREAT
Type of Ingredient:
Hydrator, Cleansing Agent, Astringent, Antioxidant, Soother, Barrier Support and Anti-Aging Agent
Intended Function:
To hydrate and reinforce epidermal and scalp barriers using glycerin’s humectant action, while rosemary-derived phytochemicals furnish antioxidant defense and soothe inflammation.
Common Applications:
Ideal for inclusion in hydrating serums, toners, creams, scalp mists, leave-on conditioners, facial masks, and astringent sprays designed to enhance moisture retention, clarity, and oxidative protection.
Target Audience:
Perfect for brand owners formulating treatments for dehydrated, mature, sensitive, or pollution-exposed skin, as well as those catering to consumers seeking scalp clarity and lightweight conditioning without irritation.
Also Known As:
Rosmarinus officinalis (Rosemary) Leaf Extract, Rosemary Leaf in Glycerin.
Safety Analysis
The Cosmetic Ingredient Review (CIR) Expert Panel affirms that rosemary-derived ingredients — when formulated to be non-sensitizing — are safe for cosmetic use as skin conditioning or fragrance agents. While rosemary leaf extract is generally well tolerated, formulators should be aware of cumulative exposure to phenolic compounds, especially in multi-botanical formulations. Glycerin is renowned for its safety and non-irritating nature.
References
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