Sargassum Muticum Extract
INCI: SARGASSUM MUTICUM EXTRACT
Reviewed by Rosie · Last updated 2 Jun 2026
A brown algal extract with antioxidant properties that may help protect skin from UV-induced damage
Best For Skin Types
All, Sensitive, Mature
Addresses
Usage Frequency
Daily
What Is Sargassum Muticum Extract?
Sargassum muticum extract is derived from a species of brown seaweed (kelp) and contains naturally occurring compounds with antioxidant activity. These compounds work to neutralise free radicals and oxidative stress in skin, which can accumulate from sun exposure and environmental factors.
In skincare formulations, this ingredient functions as a skin protectant, helping to defend the skin barrier and cellular components against damage that can contribute to visible ageing and inflammation.
How It Works
Sargassum muticum contains secondary metabolites and polyphenolic compounds that act as antioxidants. These molecules donate electrons to free radicals, stabilising them and preventing them from damaging skin cell structures like DNA, proteins and lipids.
Research in both cell models and animal studies suggests the extract may also support the skin's natural collagen matrix and help reduce visible signs of UV-induced photoaging, though the precise mechanisms in human skin remain incompletely understood.
Clinical Evidence & References
In vitro and animal studies show promising antioxidant and cytoprotective activity. Research using hairless mice exposed to UVB radiation found that oral administration of the extract reduced wrinkle formation and preserved collagen fibre integrity compared to controls. Cell-based assays on human keratinocytes demonstrated antioxidant capacity and protection against oxidative stress.
However, evidence in human skin is limited. Most available data comes from laboratory and animal models rather than clinical trials on human participants, so claims about visible results in real-world use should be treated as preliminary. Further human studies would help clarify efficacy and optimal application methods.
Published Research
How to Use
Sargassum muticum extract is typically incorporated into serums, moisturisers and targeted treatments. Use as directed on the product label. As with any antioxidant serum, apply to clean, dry skin before moisturiser. It works well alongside sunscreen as part of a comprehensive photoprotection routine, though it should not replace broad-spectrum SPF.
Safety & Precautions
Frequently Asked Questions
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