Fatty Acids
Dioic Acid
Reviewed by Daisy · Last updated 4 Aug 2026
Also known as: Octadecenedioic Acid
EWG Safety Score
2
Low
What Is Dioic Acid?
Naturally found in various vegetable oils, dioic acid helps reduce excess sebum whilst diminishing P. acnes bacteria.
This ingredient has been shown to improve the appearance of uneven skin tone, making it beneficial for those with oily or blemish-prone skin.
From the Clinic
Not sure what your skin actually needs?
Two minutes, a few questions, and we’ll point you at what matters — no guesswork.
Take the skin quizLearn More About Skincare Ingredients
Explore our comprehensive ingredient glossary to understand what's in your products.
Browse All IngredientsShop Our Products
Find professional skincare solutions at Skintique.