Sea Fennel



Sea Fennel at a glance

  • Also called Crithmum maritimum
  • Type of edible flowering plant
  • Rich in antioxidants
  • Has been shown to protect skin’s barrier
  • Considered a sustainable ingredient

Sea Fennel description

Sea fennel, also known by its taxonomic name _Crithmum maritimum_, is a type of edible flowering plant native to parts of Europe and Africa. Sea fennel is nutrient-rich and has long been used in traditional medicines to treat a variety of ailments. In skin care, its biggest value is its antioxidant content. Sea fennel contains numerous antioxidants, including polyphenols. Studies have found it can be used to preserve skin’s barrier and help defend against oxidative stress. It is also considered a sustainable ingredient because of its abundant natural growth. Usage levels for sea fennel in cosmetics haven’t been firmly established. It’s typically supplied in hydrolyzed form, so on the label you’d see the ingredient name Hydrolyzed Crithmum Maritimum.

Sea Fennel references

  • Antioxidants, January 2023, page 252
  • Journal of Cosmetic Dermatology, February 2019, pages 355-370

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.