Laminaria Digitata Extract


Plant extracts

Laminaria Digitata Extract at a glance

  • Marine plant extract that can soothe distressed skin
  • Visibly eases signs of aging due to sun damage
  • Plays a role in reducing acne-related redness
  • Also known as sea kelp and brown seaweed

Laminaria Digitata Extract description

_Laminaria digitata_ is a marine plant extract rich in nutrients and compounds that help to soothe signs of reddened, irritated skin and mitigate signs of sun damage. Also known as sea kelp and brown seaweed, _Laminaria digitata_ contains skin-soothing beta-glucan, polyphenolic antioxidants known as phlorotannins (these help brown seaweed withstand UV exposure) and phloroglucinol, which are responsible for this extract’s skin-calming benefit. These and other antioxidants help support skin’s firm look and feel, making _Laminaria digitata_ a great option to see in anti-aging products. Usage levels of _Laminaria digitata_ extract range from 0.0001%–5%, depending on formulary needs and desired claims. It is among the edible types of seaweed and several toxicology tests have consistently shown this extract is non-irritating when applied to skin.

Laminaria Digitata Extract references

  • Evidence-Based Complementary and Alternative Medicine, February 2022, pages 1–16
  • Foods, July 2021, pages 1–27
  • Marine Drugs, March 2021, pages 1–28 ; and December 2019, pages 1–19
  • Cosmetics, August 2020, pages 1–21
  • Phytochemical Analysis, November 2017, pages 487–495

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

We have not yet rated this ingredient because we have not had a chance to review the research on it.