Jania Rubens Extract
Reviewed by Kate · Last updated 30 Jul 2026
Also known as: Jania rubens extract, Red marine algae
From a type of red algae
EWG Safety Score
What Is Jania Rubens Extract?
Jania rubens extract comes from a type of red marine algae. Like most types of algae, it has multifaceted benefits for skin. Research demonstrates that this type of algae extract is a good source of antioxidant-rich flavonoids and that it helps fight signs of UV-related aging. It also contains glycosaminoglycans, a group of complex proteins that support skin hydration and replenishment (hyaluronic acid is an example of a glycosaminoglycan).
There is also evidence that Jania rubens extract interrupts inflammatory processes within skin, making it a valuable soothing ingredient. Some studies even indicate that peptides derived from this extract can help skin build collagen, though more research is needed. That being said, this is still a very good ingredient and one to consider in the search for anti-aging products. The typical use level of Jania rubens extract in cosmetics is 1–2% when supplied in a water and glycerin base.
Clinical Evidence & References
Published Research
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UL Prospector, Website, Accessed June 2025 [No URL Found] UL Prospector, 2025
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Biosorption of heavy metals with algae: critical review of its application in real effluents. Sustainability, May 2023, pages 1-17 Biosorption of heavy metals with algae: critical review of its application in real effluents. Sustainability, 2023
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Applied Sciences, December 2023, pages 1-16 [No URL Found] Applied Sciences, 2023
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Algae Research, November 2022, ePublication [No URL Found] Algae Research, 2022
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The Lebanese Red Algae Jania rubens: Promising Biomolecules against Colon Cancer Cells. Molecules, November 2022, pages 1-26 The Lebanese Red Algae Jania rubens: Promising Biomolecules against Colon Cancer Cells. Molecules, 2022
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Pharmaceutics, November 2021, pages 1-32 [No URL Found] Pharmaceutics, 2021
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Cosmetics, June 2021, pages 1-16 [No URL Found] Cosmetics, 2021
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