Science
Mechanism of Action
Hibiscus Sabdariffa Callus Extract operates through a multifaceted approach: phytohormones within the extract promote cellular regeneration, while a rich profile of polyphenols and flavonoids delivers potent antioxidant defense against oxidative stress. Its natural alpha-hydroxy acids (AHAs) provide mild exfoliation, accelerating cell turnover for a more radiant and even complexion. Polysaccharides contribute to moisturizing and soothing the skin, while amino acids support skin repair processes. The extract also aids in reducing inflammation, bolstering skin elasticity, and demonstrating strong anti-melanogenic effects. Its anti-aging mechanisms include mitigating damage to protein production, improving antioxidant status by inhibiting GSH to GSSG transformation, reducing extracellular ATP release, and stimulating vital collagen synthesis.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In vitro assays on human skin cells and mouse melanoma cells showed Hibiscus Sabdariffa Callus Extract (HSCE) at concentrations exceeding 10% exhibited strong anti-melanogenic effects, enhanced skin barrier function, and provided significant antioxidant activity.
- 02 An in vitro study utilizing Hibiscus sabdariffa ethanol extract (HSE) significantly promoted the synthesis of collagen by 48.1% and hyaluronic acid by 24.3% in normal human dermal fibroblasts (NHDF-Ad), alongside demonstrating significant anti-inflammatory activity at 500 μg/mL.
- 03 In an in vitro study, hibiscus acid (isolated from Hibiscus sabdariffa) at 1 μg/mL significantly reduced extracellular ATP production by 30.4% in HaCaT cells, downregulated carbonyl protein content, and upregulated the GSH/GSSG ratio, suggesting anti-oxidative stress and anti-aging potential.
Transparency
Dusting Analysis
Insufficient data available to determine if this ingredient is commonly dusted, or to establish dusting thresholds or red flag percentages.
The Formula
Formulation
Stability
The optimal pH for 'Hibiscus Sabdariffa Flower Extract' is reported to be between 3.5-5.5, which may serve as a guide for the callus extract. The stability and release of key bioactive compounds, particularly polyphenols, can be influenced by pH, with potentially lower release in highly acidic environments compared to neutral solutions. The specific extraction method (e.g., water, ethanol) significantly impacts the content and profile of bioactive compounds.
Safety
Safety Profile
Hibiscus Sabdariffa Flower Extract and general Hibiscus Sabdariffa extracts are widely considered safe for cosmetic applications, non-toxic, and without known adverse effects when used in appropriate concentrations. While the specific callus extract is 'not reviewed' by CIR, the organization is prioritizing botanical ingredients for review in 2024, which may include related Hibiscus Sabdariffa extracts. An in vitro study indicated no cytotoxicity for crude extracts up to 1000 μg/mL. Liposome formulations of Roselle extracts have also shown reduced dermal irritation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hibiscus Sabdariffa Callus Extract is a valuable multi-active ingredient, demonstrating significant in vitro potential for anti-aging, brightening, hydrating, and anti-inflammatory benefits across various skin types.
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