Undecylenic Acid
What Undecylenic Acid is & what it does
A naturally derived antifungal that helps preserve formulas and control fungal growth. It is plant-based and gentle.
What does Undecylenic Acid do in skincare?
Undecylenic Acid is a fatty acid used in cosmetic formulas mainly as a conditioning and stabilizing ingredient. It is best known in the wider market for antifungal use, and in skincare it can also help with texture and product feel.
Is Undecylenic Acid safe?
Undecylenic Acid has a long record of cosmetic and topical use and is generally well tolerated at the levels used in formulas. As with any fatty acid, undiluted or high concentrations could irritate sensitive skin, so it is used at controlled amounts in finished products.
Is Undecylenic Acid natural or synthetic?
It can be derived from castor oil, making plant-sourced versions available, though it is also produced synthetically. The naming refers to the chemical compound itself, so its origin depends on the specific manufacturing route.
Sunscreens with Undecylenic Acid
We rate 14 sunscreens that contain it, showing the top 10 by overall score:
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Equilibra Aloe Crema Solare Viso Anti-Age (Anti-Aging Sun Face Cream) SPF 50+
86/100
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Cieffe Derma Hydralen Sun® Protezione Solare Pelli Sensibili E Arrossate SPF 50+
84/100
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Equilibra Aloe Crema Solare Tattoo Specialist SPF 50+
83/100
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Equilibra Aloe Crema Solare Sun Cream SPF 50+
83/100
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Equilibra Aloe Crema Solare Bambini (Baby Sun Cream) SPF 50+
83/100
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Equilibra Aloe Sun Cream SPF 50
82/100
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Equilibra Aloe Crema Solare Sun Cream SPF 30
77/100
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Equilibra Aloe Crema Solare Viso Spf 50+
77/100
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Equilibra Aloe Latte Solare Sun Milk SPF 20
73/100
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Sun Scoop Kids Sunscreen SPF 30+ PA++++
71/100