Science
Mechanism of Action
Calcium Carrageenan organizes into a three-dimensional double-helix network that binds water molecules to the epidermis. This structure creates a non-occlusive, 'second-skin' film that significantly reduces transepidermal water loss (TEWL) while its shear-thinning properties ensure the product glides effortlessly upon application.
Research
Clinical Evidence
High confidence0.75%
Key findings
- 01 Concentrations of 0.4% are clinically recommended for optimizing serum viscosity and surface hydration without leaving a tacky residue.
- 02 At a 1.0% concentration, the ingredient demonstrates a significant measurable improvement in barrier fortification and long-term moisture retention.
- 03 Dermal safety testing at 0.75% confirmed zero significant irritation or sensitization in human clinical trials.
Transparency
Dusting Analysis
Because it functions as a primary rheology modifier, using it below 0.4% in serums often suggests it is being used for label claims rather than structural or hydrating efficacy. However, its high thickening power means even small amounts can impact texture.
The Formula
Formulation
Stability
Requires thermal activation (approx. 70°C) for complete hydration; it is exceptionally stable in saline-rich environments due to its calcium salt form.
Synergies
- Hyaluronic acid
- Glycerin
- Electrolyte-rich minerals
Conflicts
- Cationic surfactants
- High ethanol concentrations
- Formulas with pH below 4.0 (risk of autohydrolysis)
Safety
Safety Profile
FDA GRAS status (21 CFR 172.626). While rinse-off products can utilize up to 13.2%, leave-on facial applications are typically formulated much lower for optimal haptics.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An excellent precision ingredient for achieving sophisticated texture and breathable barrier protection in high-performance hydration systems.
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References
Sources