What it is
Ascophyllum Nodosum Extract is derived from a brown seaweed (knotted wrack) that grows on North Atlantic shorelines. It contains polysaccharides, minerals, and other marine compounds that contribute humectant, conditioning, and antioxidant character to formulas. It is commonly used in marine-themed skincare and sunscreens for a soothing, hydrated finish.
Safety & warnings
Marine algae extracts of this type are generally well tolerated at cosmetic use levels. As with any botanical, sensitization is possible in predisposed individuals. It is water-based and not considered comedogenic; people with iodine sensitivities sometimes prefer to be cautious with seaweed-derived ingredients.
Origin & sourcing
Natural. It is extracted from the brown alga Ascophyllum nodosum, harvested from cold North Atlantic coastal waters.
Questions everyone asks
What kind of seaweed is this?
It comes from Ascophyllum nodosum, a brown seaweed also called knotted wrack that grows along North Atlantic coasts.
What does it add to a sunscreen?
It contributes humectant, soothing, and antioxidant-type conditioning from its marine polysaccharides and minerals.