Antioxidants counter free radicals, unstable molecules produced by things such as UV light and poor air quality. Free radicals can start a chain of cell damage, so interrupting that chain is the basic idea behind antioxidant products.1

Products that pair ferulic acid with other antioxidants may help reduce inflammation and redness, fade sunspots and hyperpigmentation, prevent wrinkles, and limit sun damage.1

Think prevention rather than repair. Ferulic acid seems more useful for helping prevent damage than undoing marks or lines already present. Topical sunscreen remains the main method of UV protection, so use it as its own step rather than treating an antioxidant serum as sun protection.12

How to use it

  1. 1In the morning, apply it after cleansing, as you would an antioxidant serum.
  2. 2Apply it over your face. Include your neck and hands if you are concerned about aging skin there.
  3. 3Apply any spot treatments after it.
  4. 4Finish with sunscreen.
1

Ferulic acid can help vitamin C keep its potency longer, a bit of formula maintenance that does not need a second morning appointment. If an antioxidant product you already use contains ferulic acid, it does not need a separate step in your routine.1

Who might want to use it

Most people can use ferulic acid without side effects, and it is usually well tolerated across skin types. It is not considered a particularly harsh ingredient.1

Products with ferulic acid tend to cost more, so even a supporting role gets a visible line on the receipt. Adding it is optional: it may suit someone looking for more antioxidant support, while someone happy with their current routine has no need to add it.1

Where this answer comes from

  1. 1Ferulic Acid: What It Is and Skin Benefitshealth.clevelandclinic.org
  2. 2Antioxidant photoprotective agentsdermnetnz.org