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Moumoujus

ROSMARINUS OFFICINALIS LEAF/STEM WATER.

Valuable / ANTIOXIDANT, HUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Rosmarinus Officinalis Leaf/Stem Water is an aqueous solution, obtained via steam distillation, that harnesses the natural benefits of rosemary for skin. It is recognized for its broad spectrum of activity, including antioxidant, anti-inflammatory, and antimicrobial properties, making it a versatile ingredient in skincare formulations.

Summary

Antioxidant Anti-inflammatory Antimicrobial Humectant Skin-Conditioning Astringent Perfuming

Science

Mechanism of Action

This botanical water operates through several key pathways to enhance skin health. Its primary action is antioxidant, neutralizing free radicals and inhibiting oxidative processes, attributed to potent compounds like rosmarinic acid, carnosol, and carnosic acid. Rosmarinic acid further contributes to its anti-inflammatory capacity, effectively soothing irritation and minimizing redness. The ingredient also exhibits antimicrobial and antibacterial effects, aiding in the management of breakouts by targeting pathogenic bacteria. Functionally, it acts as a humectant to draw and retain moisture, a skin conditioning agent and emollient to promote softness, and an astringent to refine pore appearance and balance sebum production in oily skin. Emerging research also points to its potential in improving skin elasticity, supporting collagen synthesis, and contributing to a more even skin tone.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 While direct clinical studies specifically on Rosmarinus Officinalis Leaf/Stem Water are limited, research on other rosemary derivatives, such as essential oils and hydroalcoholic extracts, has demonstrated benefits. For instance, rosemary essential oil has shown efficacy comparable to 2% minoxidil in improving microcirculation and treating androgenetic alopecia, while specific extracts have displayed anti-pollution effects when complexed with algae proteins.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 4.7
0 7 14

Stability

As an aqueous solution produced via steam distillation, this ingredient is inherently water-based. While its specific optimal pH range for stability as a hydrosol isn't widely documented, a related rosemary leaf extract in water has shown stability between pH 4.0 and 4.7.

Conflicts

  • Potential for sensitivity in individuals with known allergies to rosemary fragrance components, as trace amounts of essential oil may be present even in the hydrosol form.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Moderate

Rosmarinus Officinalis Leaf/Stem Water is considered safe for cosmetic use by the CIR Expert Panel when formulated to be non-sensitizing. It is also listed by the FDA as Generally Recognized As Safe (GRAS) for food use. However, the CIR report documented instances of irritation in individuals with existing contact dermatitis or eczema, and allergic reactions, including stronger responses in photopatch tests, have been reported for rosemary leaves. Formulators are cautioned to adhere to good manufacturing practices and consider the cumulative effect of botanical constituents to prevent potentially hazardous levels of active compounds.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

This hydrosol is a valuable multi-functional ingredient, offering significant antioxidant, anti-inflammatory, and antimicrobial benefits for a wide range of skin types, though direct clinical data for its specific form is still developing.

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