Undaria Pinnatifida (Algae) Extract Excellent Antioxydant Anti-âge Apaisant Undaria Pinnatifida (Algae) Extract description _Undaria pinnatifida_, also known as brown algae, is a type of seaweed that’s also edible. As with most seaweeds, it’s a rich source of nutrients, and those benefit skin when applied topically. Among the benefits from applying brown algae to skin are antioxidant from its polyphenols, hydration from its polysaccharides, and soothing, thanks to a compound known as fucoidan. [br] [br] In vitro (test tube) research has shown this type of algae plays a disruptive role in the pathway melanin (skin pigment) takes to make it to skin’s surface. In theory, topical use may keep discolourations at bay. [br] [br] Some research indicates brown algae has more antioxidants than red or green algae, but topically, all of them can thwart the cascade of damage common airborne pollutants can trigger on skin. Related ingredients: Algae