This Is the Cult Skincare Product That Sienna Miller Swears By for Glowing Skin

When it comes to deciphering whether or not a skincare product is actually any good, I fully understand how difficult it can be. Trying to work out exactly what claims should be taken seriously (and what should be written off as marketing gibberish) can prove frustrating to say the least. And when the skincare product in question already has a lot of buzz around it and comes with a hefty price tag, it’s all the more likely for confusion to hit fever pitch.

Evidently, it seems this is exactly how a lot of people feel about SkinCeuticals C E Ferulic Serum (£135). Used by celebrities such as Sienna Miller and Hailey Bieber and loved by skincare experts and beauty editors far and wide, this rather expensive skincare product has caused quite the commotion in the industry over the last few years. In fact, I’d go as far as to say that this little bottle of serum has been my most asked-about product by friends and colleagues.

First of all, I’d like to address the price tag. Yes, it is incredibly expensive, and I would never claim that anyone needs to spend £135 on a serum. However, I must admit that it is an unbelievably great product. Containing an extremely potent blend of vitamin C, E and ferulic acid, this serum is widely considered one of the most efficacious antioxidant serums out there. It works to protect the skin from skin-damaging free radicals and helps brighten and reduce the appearance of existing pigmentation and fine lines.

Honestly, out of the hundreds of skincare products I have tried in my time as a beauty editor, nothing helps my skin quite like SkinCeuticals’ C E Ferulic. But a word of warning: This isn’t your typical luxury product. Typically, spending £100+ on a skincare product might buy you a deeply nourishing La Mer face cream or a rich La Prairie eye cream, however, purchasing this serum isn’t going to give you an at-home spa experience. It’s clinical skincare that means business—it’s formulated to treat your skin above anything else and it doesn’t come decorated in luxe packaging with a fancy smell or texture. It looks basic, but the results are far from it.

And personally, I think the results are what makes it such a hit among the A-list. It works to protect their skin from daily damage to ensure their complexions are at their most glowy day in and day out. Keep scrolling to discover which celebrities swear by this cult antioxidant serum, and then shop it for yourself.

While Sienna’s complexion is virtually flawless, that doesn’t mean she doesn’t have to work for it. Speaking to The Telegraph, she said, “I see the facialist Una Brennan, who operates out of her living-room in Notting Hill in London—I call it Una’s Chambers. It’s a pretty intense experience: She uses freezing ice masks that make you feel as if your brain is going to fall out of the top of your head. You look wonderful afterwards, though. Una got me on to SkinCeuticals C E Ferulic Serum and now I use it every day.”

Hailey recently took to her Instagram stories to reveal her current skincare lineup, including some products she’s been using for years. And what serum featured in her roundup? You guessed it. Alongside a picture of the SkinCeuticals C E Ferulic Serum, she wrote, “this serum is a favorite of mine.”

Besides the fact that it works to reduce signs of ageing and protect your skin from further damage, Jessica Chastain uses the serum to make her suncream work harder. Talking to Vogue, she said: “I read a while ago that if you put vitamin C on before sunscreen it makes the sunscreen more effective, so I do that. I like SkinCeuticals C E Ferulic. Just a couple of drops every day before sunscreen.”

At 54 years old, we’re totally blown away by the amazing condition of Brooke Shields skin, and she puts her anti-ageing luck down to SkinCeuticals’ C E Ferulic Serum. She told Redbook, “I’m obsessed with SkinCeuticals C E Ferulic Serum. It’s packed with antioxidants and really brightens my skin, and since I began using it, I’ve noticed a difference in my fine lines.”

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