Algae Exopolysaccharides
AKA “Seaweed polysaccharide, Marine biopolymer
Synthetic
Ingredient Facts
Algae exopolysaccharides
AKA: Seaweed polysaccharide, Marine biopolymer
Synthetic · Humectant · EWG: 4
Synthetic
Humectant
Occlusive
Skin Conditioner
Barrier Support
Marine
Synthetic
Clean
Algae Exopolysaccharides are exopolysaccharides released by the fermentation of various species of microalgae of the divisions, Rhodophyta and Chlorophyta. Science: Functions: Film Forming, Humectant, Skin Conditioning, Skin Protecting Safety Ratings: CIR: Safe as used
CAS #
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Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Protecting
Helps rebuild and strengthen your skin barrier — the invisible shield that keeps moisture in and irritants out. Essential after over-exfoliating or harsh weather.
Nourishes & Protects
Locks In Moisture
Traditional Use
Derived from marine algae, represents modern biotechnology extraction of compounds that marine organisms have naturally produced. Used in contemporary skincare for their hydrating and protective film-forming properties, building on traditional uses of seaweed in Asian skincare.
Skin Types
all-skin-types
Best For
Dehydration
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
Dermal absorption: 2%. Source: CIR Safety Assessment (CIR Seq 680).
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR