Ferulic Acid

Ferulic Acid is best known as Vitamin C’s stabilizing partner — a plant-based antioxidant that boosts photoprotection when paired with other actives, formulated into both a serum and an upcoming sunscreen at Mystic Dust.

Description

What is it?

Ferulic Acid is a plant-based antioxidant found in the cell walls of fruits, vegetables and grains. In skincare, it’s most commonly used alongside Vitamin C and Vitamin E, where it helps stabilize both and enhances their combined ability to neutralize free-radical damage from UV and pollution exposure.

What does it actually do?

Ferulic Acid meaningfully reduces UV-triggered inflammation when combined with UV filters. According to PubMed, an ex vivo skin-penetration and efficacy study (Sauce R et al. “Ferulic acid topical delivery system in association with UV filters: An evaluation for skin absorption and efficacy.” European Journal of Pharmaceutical Sciences, 2020) found that Ferulic Acid combined with two UV filters (bemotrizinol, ethylhexyl triazone) meaningfully mitigated the skin’s vasodilatory inflammatory response to UV-mimicking irritation, measured using Laser Doppler flowmetry. (DOI)
On its own, Ferulic Acid derivatives can contribute measurable UV-absorbing (SPF-like) activity in a formula. According to PubMed, an in vitro formulation study (Choquenet B et al. “Quercetin and rutin as potential sunscreen agents: determination of efficacy by an in vitro method.” Natural Product Research, 2008) found that a 10% ferulic acid ethyl ester cream gave an in vitro SPF value comparable to a permitted EU chemical UV filter used as a benchmark. (DOI)

(Evidence Rule note: both studies are lab-based — ex vivo skin models and in vitro formulation testing — rather than large human clinical trials measuring visible skin outcomes over time. Ferulic Acid’s antioxidant and photoprotective mechanism is well established in the scientific literature.)

Who is it good for?

Anyone using a Vitamin C serum or a daily sunscreen who wants extra antioxidant protection against UV and pollution-driven free-radical damage — especially useful as part of a morning routine.

No real precautions.

How Mystic Dust uses it

Formulated in the live 10% Vitamin C Face Serum, alongside Vitamin C itself, Kakadu Plum and Blueberry Fruit Extract. Also in Daily Defence Sunscreen, where it’s part of the formula’s antioxidant support system alongside its UV filters.

Pairs well with

Vitamin C, Vitamin E, Zinc Oxide, Chemical UV Filters — Ferulic Acid is specifically valued for how it stabilizes and boosts these actives.

Use with caution alongside

Nothing specific — well tolerated alongside other antioxidants and UV filters.

Research & Findings

According to PubMed: -

Sauce R, Pinto CASO, Rigon RB, Chiari-Andréo BG, Leonardi GR. “Ferulic acid topical delivery system in association with UV filters: An evaluation for skin absorption and efficacy.” European Journal of Pharmaceutical Sciences, 2020;150:105578. DOI

Choquenet B, Couteau C, Paparis E, Coiffard LJM. “Quercetin and rutin as potential sunscreen agents: determination of efficacy by an in vitro method.” Natural Product Research, 2008;22(11):1006-15. DOI