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ALTHAEA ROSEA ROOT EXTRACT.

Valuable CAS 90045-76-4 / HUMECTANT

Althaea Rosea Root Extract is a botanical active leveraging its rich mucilage content to form a protective barrier, significantly enhancing skin hydration and soothing sensitivity. Complemented by antioxidants and flavonoids, it contributes to overall skin health and resilience against environmental stressors.

Summary

Humectant Protective Barrier Support Antioxidant Soothing Skin Conditioning Skin Regenerating

Science

Mechanism of Action

This extract acts through multiple pathways to benefit the skin. Its mucilage forms a hydrophilic film on the skin's surface, effectively sealing in moisture and creating a physical shield against external aggressors. The presence of antioxidants helps to neutralize free radicals, thereby minimizing oxidative stress that contributes to visible skin aging. Additionally, flavonoids are believed to support skin regeneration processes and promote a more uniform complexion. While well-regarded for its soothing and anti-inflammatory properties, research also indicates its capacity to modulate immune cell responses, involving the activation of pathways like MAPK/NF-κB.

Research

Clinical Evidence

Medium confidence
Effective range 0.01–0.1%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.01%

Althaea Rosea Root Extract is reported in cosmetic formulations at concentrations up to 2%. Given that in vitro studies demonstrate biological activity at concentrations as low as 0.01% (100 µg/mL), usage significantly below this level for primary efficacy claims would be considered dusting. However, current usage patterns and observed in vitro efficacy suggest it is generally used in effective concentrations.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 6.5
0 7 14

Stability

The extract is inherently water-soluble, typically obtained by aqueous extraction methods. For optimal stability, an acidic pH range between 5.0 and 6.5 is suggested, referencing data from the closely related Althaea Officinalis Root Extract.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
2%
Sensitization risk Low

The safety of Althaea rosea flower extract, sharing CAS No. 90045-76-4 with the root extract, has been evaluated based on the Threshold of Toxicological Concern (TTC) and its history of safe food consumption. This assessment concluded that cosmetic exposure, reported up to 2% in products, is considerably lower than dietary intake and is unlikely to pose additional health risks. No genotoxicity concerns have been identified. While generally considered mild and gentle for skin, patch testing is recommended for individuals with heightened sensitivity or known allergies.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Althaea Rosea Root Extract is a valuable ingredient for comprehensive skin support, offering significant hydration, barrier protection, antioxidant benefits, and soothing properties, making it suitable for all skin types.

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