Ascophyllum Nodosum

Ascophyllum Nodosum 1
Ascophyllum Nodosum 2
Ascophyllum Nodosum 3
Ascophyllum Nodosum 4
AKA: Knotted Wrack, Ascophyllum Nodosum Powder
Plant-Derived Synthetic
Skin Conditioner
Marine
Not Clean
Ascophyllum Nodosum is the alga, Ascophyllum nodosum, Fucaceae.
CAS #
84775-78-0
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 harvested for centuries from North Atlantic coasts and used in traditional Irish and Scottish skincare practices. Valued for its mineral content and traditional use in seaweed wraps for skin nourishment and detoxification.
EWG
3
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
ewg-3
medical-approval
all-shades-safe
Moderate Irritant
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
Dullness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR