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Macrocystis pyrifera (Kelp) extract
AKA “Kelp Extract”
Extract
Ingredient Facts
Macrocystis pyrifera (Kelp) extract
AKA: Kelp Extract
Extract · Skin Conditioning · EWG: 4
Plant-Derived
Skin Conditioner
Marine
Extract
Not Clean
Macrocystis Pyrifera (Kelp) Extract is a cosmetic ingredient. Assessed as safe by the CIR.
Plant Part
Whole Plant
CAS #
347174-92-9
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.
Controls Viscosity
Antioxidant Protection
Reduces Inflammation
Locks In Moisture
Traditional Use
Derived from traditional kelp preparations used in Asian skincare for centuries; modern extraction methods preserve the mineral, vitamin, and polysaccharide content valued for moisturizing and antioxidant properties.
Skin Types
●all-skin-types
Best For
Dullness
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Moderate Irritant
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Alaria esculenta (sea kelp) extract
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Ascophyllum nodosum (kelp) powder
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Ascophyllum nodosum [Kelp] Extract
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Macrocystis Pyrifera (Kelp)
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Macrocystis Pyrifera (Kelp) Blade/Pneumatocyst/Stipe Juice Extract
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Macrocystis Pyrifera (Kelp) Extract
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Macrocystis Pyrifera (Kelp) Juice
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Macrocystis Pyrifera (Kelp) Protein
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Macrocystis Pyrifera (Kelp)
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Macrocystis Pyrifera (Kelp) Protein
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Physicochemical characterization and cosmetic application of kelp blanching water polysaccharides.
Liu P, Hu J, Wang Q, Tan J, Wei J et al.
International journal of biological macromolecules, 2023
→
Verified Jun 2026
Data: CosIng · EWG · CIR