Science
Mechanism of Action
This extract exerts its diverse effects through a rich array of bioactive compounds. Polysaccharides within the extract function as humectants, effectively drawing and retaining moisture to significantly enhance skin hydration and suppleness. Its robust antioxidant profile, featuring polyphenols, phycoerythrin, and mycosporine-like amino acids (MAAs), actively neutralizes free radicals, safeguarding the skin from environmental damage and mitigating premature aging signs. Phycoerythrin and bioactive peptides contribute anti-inflammatory properties, providing a soothing effect on sensitive or irritated skin, helping to reduce redness, and potentially beneficial for conditions like eczema and rosacea. MAAs also confer protective benefits against UV radiation. Furthermore, specific peptides may stimulate collagen synthesis for enhanced anti-aging efficacy, while the extract collectively supports microcirculation, promotes cell renewal, brightens the complexion, and aids in evening skin tone.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In vitro studies demonstrated a dose-dependent inhibition of HeLa cell proliferation at concentrations between 0.5 mg/mL and 5.0 mg/mL, with maximal effects observed at 48 and 72 hours, attributed to the extract's polyphenol content.
- 02 Potent radical scavenging activity was observed in vitro, with an IC50 value of 0.30 ± 0.04 mg/mL when extracted at pH 6.
- 03 The highest Fe2+ chelation activity in vitro was recorded at an IC50 of 0.65 ± 0.03 mg/mL when extracted at pH 12.
- 04 In vivo acceptability studies of a gel-cream formulation containing Palmaria Palmata Extract over 30 days showed no alterations in skin barrier function, no sensory irritation, and no erythema.
Transparency
Dusting Analysis
There is no indication in the available research data that Palmaria Palmata Extract is commonly used at negligible concentrations for marketing purposes. Its demonstrated benefits suggest functional inclusion.
The Formula
Formulation
Stability
Palmaria Palmata Extract is known for its relative stability and high solubility in water, making it straightforward to integrate into aqueous-based formulations such as serums and moisturizers. While phenolic compounds within the extract are sensitive to pH shifts during extraction, which can impact their solubility, specific stability ranges for the extract in final cosmetic formulations are not explicitly detailed.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined Palmaria Palmata Extract, also identified as Rhodymenia Palmata Extract, to be safe for use in cosmetic and skincare products. In vitro toxicity assessments, including the HET-CAM assay, confirmed no irritant or phototoxic potential. Furthermore, 30-day in vivo acceptability studies consistently showed no disruption of the skin barrier, sensory irritation, or erythema. Although specific maximum concentrations for cosmetic application are not detailed, the CIR report broadly covers red algae-derived ingredients. The EWG notes low concern for cancer and developmental/reproductive toxicity, though it lists the ingredient as 'Restricted' for EWG VERIFIED products pending further substantiation regarding allergies and immunotoxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Palmaria Palmata Extract is a highly valuable multi-functional ingredient, providing robust hydration, antioxidant defense, soothing properties, and complexion brightening, supported by comprehensive safety data suitable for all skin types.
Related
Similar Ingredients
Finding similar ingredients…