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Ascophyllum nodosum (Kelp) powder
AKA “Kelp Powder”
Synthetic
Ingredient Facts
Ascophyllum nodosum (Kelp) powder
AKA: Kelp Powder
Synthetic · Antioxidant · EWG: 4
Plant-Derived Synthetic
Antioxidant
Humectant
Soothing
Skin Conditioner
Marine
Synthetic
Clean
Nutrient-rich kelp from the North Atlantic that deeply conditions and nourishes hair and skin, leaving it soft and hydrated.
CAS #
84775-78-0
Form
Powder
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.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Soothing
Calms redness, irritation, and inflammation. Your skin's chill pill — great for sensitive, reactive, or post-procedure skin.
Conditions Skin
Reduces Inflammation
Locks In Moisture
Softens & Smooths
Traditional Use
Used in traditional Celtic and Scandinavian skincare for centuries due to its mineral-rich composition. Valued in folk medicine for skin nourishment and as a natural exfoliant.
Skin Types
●all-skin-types
Best For
Dehydration
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
all-shades-safe
Moderate Irritant
Regulatory Status
USAunder review
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 Feb 2026
Data: CosIng · EWG · CIR