Lithothamnion calcareum extract
AKA “Red Algae Extract, Lithothamnion Calcareum Extract”
Extract
Ingredient Facts
Lithothamnion calcareum extract
AKA: Red Algae Extract
Extract · Antioxidant · EWG: 1
Plant-Derived
Antioxidant
Soothing
Skin Conditioner
Marine
Extract
Clean
Lithothamnium Calcarum Extract Science: Origin: Botanic/Natural | Process: Solvent Extraction | Functions: Skin Conditioning Safety Ratings: CIR: Safe as used
Family
Corallinaceae (family of red algae)
Plant Part
Thallus
CAS #
Varies depending on extract
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Soothing
Calms redness, irritation, and inflammation. Your skin's chill pill — great for sensitive, reactive, or post-procedure skin.
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Locks in moisture
Traditional Use
Derived from red algae, traditionally used in coastal European and Asian communities as a mineral-rich ingredient. Modern cosmetic adoption leverages its calcium and trace mineral content for skin conditioning and pH buffering.
Skin Types
●all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
UV Photoprotection, Cytotoxicity and Immunology Capacity of Red Algae Extracts.
Álvarez-Gómez F, Korbee N, Casas-Arrojo V, Abdala-Díaz RT, Figueroa FL
Molecules (Basel, Switzerland), 2019
Lithothamnion Calcareum Extract
European Commission
EU Cosmetic Ingredient Database (CosIng)
Lithothamnion Calcareum Extract
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026
Data: CosIng · EWG · CIR