murphyMacrocystis pyrifera (Kelp) protein
AKA: Giant Kelp, Kelp Protein
Synthetic
Skin Conditioner
Marine
Not Clean
OriginDerived from macrocystis pyrifera (giant kelp), a brown seaweed harvested from cold ocean waters. Extracted through enzymatic hydrolysis or chemical processing to break down kelp biomass into protein-rich compounds.
Macrocystis Pyrifera (Kelp) Protein is a cosmetic ingredient used as skin conditioning. Rated moderate hazard by EWG. Assessed as safe by the CIR.
CAS #
347174-92-9
Form
Powder
State
Solid
Skin Types
●all-skin-types
Best For
Dullness
Pregnancy & Breastfeeding Safe
Yes
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.
Conditions Skin
Antioxidant Protection
Reduces Inflammation
Locks In Moisture
Softens & Smooths
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