How often can you use it:Most over-the-counter products can be applied twice daily.
Works well with:It works well with and is often formulated with zinc.
What Is Undecylenic Acid?
Stocksy + BYRDIE
(Fun fact: It’s not just for topical use.
It’s also found in many oral supplements to increase good bacteria in the gut, she adds.)
Side Effects of Undecylenic Acid
Minor redness and irritation may occur and is normal, says Rabach.
But if it persists and is accompanied by swelling and/or pain, discontinue using the ingredient, she adds.
Greenfield points out that having an actual allergy to the ingredient is also possible.
It should always go on clean, dry skin.
Minor redness and irritation may occur and is normal, says Rabach.
Like most over-the-counter products, it can usually be applied twice daily.
2016;54(5):343-353. doi:10.5414/CP202460
