Undaria peterseniana extract
AKA “Macrocystis Extract, Kelp Extract”
Extract
Ingredient Facts
Undaria peterseniana extract
AKA: Macrocystis Extract, Kelp Extract
Extract · Skin Conditioning · EWG: 4
Plant-Derived
Skin Conditioner
Marine
Extract
Not Clean
Undaria Peterseniana Extract is the extract of the alga Undaria peterseniana, Alariaceae.
Family
Alariaceae
Plant Part
Whole Plant
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.
Locks in moisture
Traditional Use
A brown seaweed extract with no significant traditional or historical use in cosmetics. It is a modern ingredient used in contemporary formulations for its mineral and polysaccharide content, developed as part of the broader trend toward marine botanicals in skincare.
Skin Types
●all-skin-types
Best For
Antioxidant
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR