Undaria pinnatifida (algae) extract
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.
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 discolorations at bay.
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.
References for this information:
Marine Drugs, November 2018, ePublication
Cosmetics, February 2018, ePublication; and April 2015, pages 66-81
Oncotarget, March 2017, pages 17,887–17,896
Interdisciplinary Toxicology, May 2014, pages 89-92
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