Science
Mechanism of Action
This red algae extract offers revitalizing and re-mineralizing benefits by stimulating blood circulation and boosting cell renewal. Its highly hygroscopic nature contributes to deep moisturization, forming a protective barrier to create a water 'reservoir' and reinforcing the skin's natural moisturizing factor (NMF). The extract's efficacy stems from bioactive compounds such as carotenoids, peptides, and mycosporine-like amino acids (MAAs), which provide antioxidant, anti-inflammatory, and neuroprotective activities. Patented derivatives like Alga-Gorria® specifically neutralize free radicals and inhibit lipidic peroxidation to combat premature aging, while Alga-Sendatu® enhances superficial skin layer repair, restoring barrier function through stimulated keratinocyte regeneration and maturation, providing both moisturizing and soothing effects.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 An aqueous extract demonstrated significant water retention and antioxidant properties in an in vivo assay on skin.
- 02 Compositions formulated with this red algae extract were effective in restoring skin and barrier function, mitigating visible signs of aging, combating atopic dermatitis, reducing side effects of corticosteroid treatments, and preventing or treating stretch marks.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
While no explicit optimal pH range for overall formulation stability was identified, extraction of phycobiliproteins from Gelidium sesquipedale has been performed effectively using a phosphate buffer at pH 6.8. The extract demonstrates versatility, allowing for incorporation into various formulation types including aqueous solutions (lotions, gels), anhydrous systems (sticks, oils), and dispersions (emulsions, serums).
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Gelidium Sesquipedale Extract, alongside other red algae-derived ingredients, is safe for cosmetic use under current practices. Trace amounts of iodine (1.02 mg/kg) and other minerals/metals were detected in a 4% trade name mixture, remaining well below safety thresholds. The ingredient is generally considered safe, classified as 'Irritant Free' by SkinSAFE. Adherence to good manufacturing practices is advised to monitor and limit potential impurities such as heavy metals and pesticides.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Gelidium Sesquipedale Extract is an essential ingredient for comprehensive skin health, offering significant hydration, antioxidant protection, and barrier restoration across various skin concerns, making it highly valuable for targeted formulations.
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References
Sources