Undaria Pinnatifida (Algae) Extract



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.

Undaria Pinnatifida (Algae) Extract references

  • 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

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated