Kappaphycus alvarezii extract
AKA: Alga
Plant-Derived
Skin Conditioner
Extract
Clean
Kappaphycus Alvarezii Extract is an extract of the Alga, Kappaphycus alvarezii, Soleriaceae
Family
Solieriaceae
Plant Part
Thallus
Form
Liquid
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 red seaweed extract developed in the 20th century as a modern source of carrageenan and other polysaccharides; while seaweeds have been used in Asian skincare for centuries, this specific species became commercially significant only after industrialization.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR