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Ascophyllum nodosum powder
AKA “Knotted Wrack Powder, Seaweed Powder”
Synthetic
Ingredient Facts
Ascophyllum nodosum powder
AKA: Knotted Wrack Powder, Seaweed Powder
Synthetic · Antioxidant · EWG: 3
Plant-Derived Synthetic
Antioxidant
Humectant
Soothing
Skin Conditioner
Marine
Synthetic
Clean
Nutrient-rich brown algae from the Irish coast that hydrates and conditions skin, leaving it soft and supple.
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.
Locks in moisture
Traditional Use
Processed form of the brown seaweed created for ease of use in cosmetic formulations, developed in the 20th century as a standardized ingredient to deliver the traditional benefits of seaweed in powdered form.
Skin Types
●all-skin-types
Best For
Dullness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: CosIng · EWG · CIR