Design: Briana Rengifo; Photo: Courtesy of brand Save Story Save this story Save Story Save this story SkinCeuticals C E Ferulic Serum is iconic. We don’t use that word lightly here at Allure, but this skin-care product has certainly earned it. C E Ferulic has won eight Best of Beauty and Readers’ Choice Awards (six and two, respectively)—no small feat, especially for a 1-ounce serum that costs nearly $200.
Since its launch in 2005 , C E Ferulic has become well-known as one of the best antioxidant formulas on the market. Its primary claims to fame are its ability to brighten skin, combat hyperpigmentation, and add hydration. This has all been done via a potent mix of the three ingredients in the name: 15% vitamin C, 1% vitamin E, and 0.5% ferulic acid. People are, in a word, obsessed with the results they say they see from adding CEF to their routine.
So if you heard a strange, faint gust of wind on July 20, 2026, it was likely the collective gasp of skin-care enthusiasts and dermatologists around the globe after SkinCeuticals announced it had reformulated the best-selling formula. The corresponding press release—which the Allure team got access to in early July, along with product samples—says CEF 2.0 is building on the original’s legacy by way of “exclusive longevity technology.”
Just reading the word “longevity,” a now-inescapable marketing term , fills me with a profound mix of dread and exhaustion. But, as a C E Ferulic loyalist at my core, my interest was piqued. Here’s everything we know about the update, plus our honest thoughts after testing the serum for a few weeks.
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Why on earth would SkinCeuticals go and mess with a formula that is widely considered the best of the best? “It was a delicate decision, obviously,” Stephen Lynch, head of skin-care valorization, research and innovation for North America at L’Oréal Groupe (meaning he helps guide product development and then tells the general public about those new innovations), tells Allure . But it’s been 20 years since the original launch and, according to Lynch, the team has never stopped trying to improve on it.
“We have always been thinking, ‘How could we modernize [the serum] or bring a little extra while preserving what we have?” Lynch says. He insists that the bidecadal anniversary was just “the right time” to roll out a new-and-improved version.
Fair, but also… the patent on the original formula expired last year, leaving doors open for other brands to launch extremely similar serums, at least as far as the ingredient list goes. With no active patent on the formula, L’Oréal, SkinCeuticals’ parent company, couldn’t bring an infringement lawsuit against those brands as it had against Drunk Elephant in 2020 . In the US, once a patent expires after the standard 20-year period of exclusivity, it has really expired: You can’t just keep renewing it every two decades, explains Sheila Swaroop , a registered patent attorney and partner at Knobbe Martens in California.
This new version of C E Ferulic is “powered by exclusive double patent-pending technology,” according to the company’s press release, which could certainly be a way to re-establish the claim that no one’s doing it quite like SkinCeuticals. Says Swaroop, “If you develop a different product and it's different enough from the original product that you can secure patent protection for it, then that can be a strategy” to sort of get your patent back. (Patents are…