Dioic Acid

Dioic acid is an organic compound derived from azelaic acid, a dicarboxylic acid already known to reduce blemishes and visible redness. It's found naturally in both animal fats and vegetable oils, and is often extracted commercially from sunflower seeds.

Dioic acid helps regulate excess sebum production and has an antibacterial effect on skin. This makes it a handy skincare ingredient for blemish-prone skin, reducing both the blemishes themselves and associated visible skin redness.
Dioic acid is also used in products intended to reduce skin hyperpigmentation and dark spots, and improve the appearance of uneven skin tone.

Yes, dioic acid is well-tolerated and generally safe to use in skincare. However, because skin sensitivity can vary from one person to another, SkinCeuticals always advises performing a patch test on any new product you plan to start using for the first time.

Formulas containing dioic acid can be used once or twice daily by applying four to five drops to dry skin.