Ferulic Acid in Skincare: What It Does and Why We Use It
Ferulic acid is a plant-derived antioxidant that works best as a team player. The research is encouraging when it is paired with vitamins C and E, and weaker on its own. It is not a sunscreen and it does not replace one.
What is ferulic acid?
Ferulic acid belongs to a family of plant compounds called hydroxycinnamic acids. Plants use them to cope with sun and environmental stress, and that same antioxidant behaviour is why cosmetic chemists like them.
On an ingredient list it appears as Ferulic Acid, usually in small amounts as a supporting act rather than the headline active.
What does ferulic acid do for skin?
- Antioxidant: it helps neutralise free radicals, the unstable molecules created by UV light and pollution.
- Formula partner: it is studied for helping keep vitamin C and vitamin E stable and effective.
- Photoprotection support: combinations that include ferulic acid have added protection against UV-related changes in studies. Treat it as a bonus on top of SPF, never instead of it.
Why we use ferulic acid
Ferulic acid is in our Retinol & Peptide Night Repair Cream, alongside sodium ascorbyl phosphate, tocopherol and niacinamide.
It makes the most sense as part of a team, because that is where the research is strongest. The best studies used it with vitamin C and vitamin E, not with the exact lineup in our cream.
Who is ferulic acid good for?
Most skin types. It is generally well tolerated and suits people who want an antioxidant step without a strong acid.
If your skin is very reactive or your barrier is compromised, patch test first. Our patch testing guide shows how.
How do you use it?
You use it by using the product it is in. Apply to clean skin, follow the label, and wear sunscreen every morning.
What does it pair with?
Other antioxidants. The best-studied pairing is vitamin C plus vitamin E. It also sits comfortably alongside niacinamide, CoQ10 and hydrating ingredients.
If you also use retinol or exfoliating acids, add them one at a time.
What does the research say?
Encouraging as part of an antioxidant combination, weaker as a standalone active.
- A 2005 study in the Journal of Investigative Dermatology found that adding ferulic acid to a solution of vitamins C and E improved the stability of those vitamins and roughly doubled the photoprotection measured, in a lab and skin-model setting.
- A 2025 systematic review of 18 human studies (443 patients) found four randomised trials where a ferulic acid, vitamin C and vitamin E blend reduced UV-induced redness compared with a vehicle. Other results were mixed, and the authors note small samples and formulas that make ferulic acid's own contribution hard to isolate.
- A 2017 review in Molecules describes it as a hydroxycinnamic acid with antioxidant and UV-absorbing activity.
The review authors suggest 0.5% to 1% ferulic acid in a topical routine. That is their reading of the studies, not a regulatory limit.
Ready to build a routine around antioxidants? Take the skin quiz.
FAQ
Is ferulic acid the same as vitamin C?
No. It is a separate plant antioxidant, often paired with vitamin C because it can help keep vitamins C and E stable.
Can ferulic acid replace sunscreen?
No. Keep using a broad-spectrum sunscreen every day.
Does ferulic acid cause irritation?
It is generally well tolerated, but any ingredient can irritate some people. Patch test and stop if your skin reacts.
Can I use ferulic acid with retinol?
There is no widely known conflict. Retinol can be drying, so introduce it gradually.
Related ingredients
Sources
- Lin F-H, et al. Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin. Journal of Investigative Dermatology, 2005. scholars.duke.edu/publication/722682
- Roux J, et al. Ferulic Acid Use for Skin Applications: A Systematic Review. Journal of Clinical and Aesthetic Dermatology, 2025. jcadonline.com
- Taofiq O, et al. Hydroxycinnamic Acids and Their Derivatives: Cosmeceutical Significance, Challenges and Future Perspectives, a Review. Molecules, 2017. mdpi.com
