drunk elephant c-firma day serum review

For years, I’ve gotten my vitamin C fix from Paula’s Choice C15 Booster.

It’s a dupe for Skinceuticals CE Ferulic serum, the original CEF serum (CEF stands for vitamin C, vitamin E and Ferulic acid). Same benefits for way less than half the price.

Sure, I tried different vitamin C serums over the years (hey, I’m a skincare blogger – I can’t not cheat on my HGs!), but I always came back to Paula’s Choice C15 Booster. I thought I always would.

Until Drunk Elephant C-Firma Day Serum finally hit the UK. After testing it for a month, I’m not sure I want to go back to my first love this time. Here’s why:

What’s In Drunk Elephant C-Firma Day Serum?


Wondering what’s the best antioxidant out there?


None. When it comes to antioxidants, the more, the merrier. The more antioxidants you feed your skin, the more free radicals you destroy. It’s as easy as that.

One of the most powerful combinations of antioxidants is 15% vitamin C (ascorbic acid), 1% vitamin E (tocopherol) and 0.5% Ferulic acid. It’s the one you’ll find in Skinceuticals CE Ferulic, Paula’s C15 Booster and plenty of other vitamin C serums.

Ascorbic acid is an antiaging superstar. Studies show it can:

Problem is, ascorbic acid is unstable AF. That means it loses its antiaging superpowers quickly. If it came in a see-through tube, you’ll see it turn brown (a sign it’s going bad) within a few short days.

Drunk Elephant C-Firma Day Serum has the packaging nailed right to help vitamin C last as long as possible. Vitamin E and ferulic acid help with that too.

These two antioxidants don’t just fight their own free radicals too. They also help stabilise vitamin C, making it last (and be effective) for longer. Plus, all 3 together help prevent sun damage.

P.S. Drunk Elephant gave ascorbic acid the best chance to last as long as possible. But this isn’t something you can buy now and use six months later or buy in bulk. It won’t go bad within a week but won’t last you for too many months either. Be quick!

P.P. S. This combination works best at a pH range between 2.5-3.5. Drunk Elephant C-Firma Day Serum has a pH of 3.5. The higher pH makes it less irritating than Skinceuticals CE Ferulic (pH 2.5-3) and Paula’s Choice C15 Booster (pH 3).

Related: The Complete Guide To Vitamin C: What It Does & Why You Should Use It


CEF aren’t the only antioxidants in Drunk Elephant C-Firma Day Serum. It’d take too long to list them all (and this review is already long enough), so here are the highlights:

See what I mean when I say that this vitamin C serum goes the extra mile? It’s half the price of Skinceuticals CE Ferulic yet it gives you way more antioxidants to prevent those pesky wrinkles.

Related: Everything You Ever Wanted To Know About Green Tea In Skincare

drunk elephant c-firma day serum


Pumpkins ain’t just a Halloween treat. When fermented with lactobacillus lactic, they create an enzyme with exfoliating properties.

It works by breaking down keratin, the protein that keeps those dull and rough outer layers of your skin stuck on your face. Once those are off your skin, your face looks smoother and brighter.

I prefer glycolic acid (a member of the Alpha Hydroxy Acids family)  to do the job. But if you find AHAs too harsh for your skin – or simply don’t like the idea of using acids – this is a good alternative for you.

It goes without saying (but I’ll say it anyway) that if you want to use Drunk Elephant C-Firma Day Serum but aren’t ready to give up on exfoliating acids just yet, cut back on exfoliation.

Exfoliation ain’t like antioxidants. The more you exfoliate, the higher the chance of irritating your skin. Be careful!

Related: The Complete Guide To Enzyme Exfoliants: Should You Use Them?


I’m pairing them together because they both moisturize skin – just in different ways.

Marula oil is what gave Drunk Elephant its name. Legend has it, elephants get drunk when they eat too much marula fruit.

True or false, you can’t deny its benefits for your skin. Marula oil is loaded with moisturising fatty acids that create a barrier on the skin that slows down water loss. Plus, it has its fair share of antioxidants, too.

Hyaluronic acid, on the other hand, is a moisture magnet: it attracts moisture into the skin and binds it there. It’s so powerful, it can hold up to 1000 times its weight in water!

Related: Why You Should Add Hyaluronic Acid To Your Skincare Routine

Struggling to put together a skincare routine that minimises wrinkles, prevents premature aging, and gives your complexion a youthful glow? Download your FREE “Best Anti-Aging Skincare Routine” to get started (it features product recommendations + right application order):


The only thing I DON’T like about Drunk Elephant C-Firma Day Serum? The texture’s a little sticky.


It’s fragrance-free.

How To Use It

Every morning, after cleansing to boost the protection of your sunscreen.

Performance & Personal Opinion

Despite its sticky texture, Drunk Elephant C-Firma Day Serum still works well under sunscreen and makeup. But if you’ve got oily skin, this could be a dealbreaker for you. Try to get hold of a sample if you can.

Instead, don’t worry about the golden hue of the serum. Usually, that’s a sign vitamin C is already going bad, but that’s not what’s going on here. It’s the curcuminoids (a group of anti-irritants) that gives the serum its colour.

I use Drunk Elephant C-Firma Day Serum every morning to enhance the effectiveness of my sunscreen (CEF boosts photoprotection, remember?). But you can totally use it at night too if the stickiness bothers you that much.

After a few days, I’ve already noticed my skin getting brighter. It gives it a luminous, healthy glow I really like. If you’ve got any dark spots on your skin, it brightens those up and fades them away, too.

I’m also confident the serum is helping me keep premature wrinkles away. Antioxidants prevent wrinkles so you won’t see results anytime soon (in this area anyway).

But there’s plenty of research that shows the antioxidants Drunk Elephant picked work. That’s good enough for me.

I’m hooked. Don’t try it if you don’t want to get addicted too!

Who Is This For?

It’s best suitable for dry and mature skin.

Who Is This NOT For?

Oily skin may not like the sticky texture.


A white tube with an orange cap and a pump applicator. It’s beautiful, practical, and keeps the antioxidants inside safe from the light and air that can reduce their effectiveness.

Does Drunk Elephant C-Firma Day Serum Live Up To Its Claims?

This revolutionary vitamin C serum is jam-packed with a powerful antioxidant complex of l-ascorbic and ferulic acids to reveal a brighter, firmer, and more even-looking complexion. True. But it’s not the only serum with this combo, so I wouldn’t call it revolutionary.
The result is a noticeably diminished appearance of 
photodamage and aging, replaced by incredible radiance and luminosity.

Price & Availability

£67/$80.00 at Cult Beauty, Sephora and SpaceNK

Do You Need It?

If you’re looking for an effective Vitamin C serum for dry skin, this is a great option to consider.

Dupes & Alternatives


Water/Aqua/Eau, Dimethyl Isosorbide, Ascorbic Acid, Laureth-23, Glycerin, Lactobacillus/Pumpkin Ferment Extract, Sclerocarya Birrea Seed Oil, Dipotassium Glycyrrhizate, Glycyrrhiza Glabra (Licorice) Root Extract, Vitis Vinifera (Grape) Juice Extract, Phyllanthus Emblica Fruit Extract, Camellia Sinensis Leaf Extract, Tocopherol, Lactobacillus/Punica Granatum Fruit Ferment Extract, Sodium Hyaluronate Crosspolymer, Hydrolyzed Quinoa, Phytosterols, Glutamylamidoethyl Imidazole, Hydrolyzed Wheat Protein, Ferulic Acid, Acetyl Glucosamine, Sodium Hyaluronate, Tetrahydrobisdemethoxydiferuloylmethane, Tetrahydrodemethoxydiferuloylmethane, Tetrahydrodiferuloylmethane, Glycine, Leuconostoc/Radish Root Ferment Filtrate, Sucrose, Maltodextrin, Chondrus Crispus Extract, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Isohexadecane, Phenoxyethanol, Caprylhydroxamic Acid, Caprylyl Glycol, Sorbitan Isostearate, Propanediol, Pentylene Glycol, XanthaN Gum, Butylene Glycol, Sodium Hydroxide, Chlorphenesin, Polysorbate 60, Sodium Dehydroacetate, Potassium Sorbate, Sorbic Acid, Ethylhexylglycerin