Is Eucerin Hyaluron-Filler Vitamin C Booster The Best Drugstore Vitamin C Serum For Sensitive Skin?

Last Updated on June 14, 2026 by Giorgia Guazzarotti

Are you tired of Vitamin C serums that go bad within a few weeks? You’re not even halfway through the bottle and your serum has already turned brown – the colour of death for Vitamin C. That won’t happen with Eucerin Hyaluron-Filler Vitamin C. Each tiny bottle only contains enough juice for a week. You mix it in when you’re ready to use it, so you know it’s as fresh as it can be. Intrigued? Here’s everything you need to know about this drugstore Vitamin C serum:

What’s In Eucerin Hyaluron-Filler Vitamin C Booster?

L-ASCORBIC ACID TO BRIGHTEN SKIN AND PREVENT PREMATURE AGING

Vitamin C is one of the 5 antiaging superstars (you can find out more about the others here). It does wonders for your skin:

• It fights free radicals that cause premature wrinkle
• It boosts the production of collagen, the protein that keeps skin firm and elastic
• It fades dark spots and brightens the complexion
• It enhances sun protection, especially when used with Vitamin E and Ferulic Acid (only Vitamin E is in this serum)

Vitamin C comes in many forms. Ascorbic Acid, the one Eucerin uses, is the pure form. This is both a good and a bad thing. It’s good because Ascorbic Acid is the most effective form of Vitamin C out there. Hands down. It’s bad because Ascorbic Acid is unstable and irritating. Thankfully, Eucerin has fixed both issues.

For starters, the serum contains only 10% Ascorbic Acid, a smaller dose than the 15% traditionally used in skincare, that usually doesn’t irritate skin – not even sensitive skin. Plus, you need to activate Vitamin C by adding it to the formula when you’re ready to use it. Each bottle will last you a week, so you can reap all the benefits without worrying about it losing effectiveness overtime.

Related: Types Of Vitamin C Used In Skincare: Which One Should You Choose? 

SQUALANE TO MOISTURISE SKIN

Squalene is a natural component of human sebum. It’s super moisturising… and super unstable. It goes bad quickly and makes you breakout. But hydrogenate it (ie, turn it from a liquid to a semi-solid using hydrogen gas) and it turns into squalane. It’s way more stable and 100% non-comedogenic.

Squalane oil is super moisturising. Because it’s so similar to human sebum, your skin absorbs it straight away. It doesn’t leave a greasy residue behind. Once on your skin, squalane strengthens the skin’s protective barrier so that moisture stays in and germs, pollutants and irritants stay out.

Related: The Complete Guide To Squalane In Skincare: What It Is, What It Does, And How To Use It

SODIUM HYALURONATE TO HYDRATE SKIN

Sodium hyaluronate is a form of hyaluronic acid that attracts and binds to the skin up to 1000 times its weight in water. Plus, it works well both in high and low humidity conditions. When skin has that much moisture, it plumps up. This alone is enough to make your fine lines look smaller – temporarily. Hydration also makes skin soft and gives the complexion a dewy glow (think Korean skin).

P.S. Sodium Hyaluronate isn’t the only moisture magnet here. Glycerin does the same thing, but on a smaller scale.

Related: Why You Need Hyaluronic Acid In Your Skincare Routine, No Matter Your Skin Type

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 Rest Of The Formula & Ingredients

• Aqua: Water. It’s the base of the formula and the main solvent that dissolves all the water-soluble ingredients and makes everything spreadable. Nothing works without it.
• Glycerin: A humectant that pulls moisture from the air into your skin.
• Isopropyl Palmitate: An emollient and texture agent that makes the formula feel smooth and silky on skin. It has a reputation for being comedogenic.
• Dibutyl Adipate: Another emollient, this one mainly here for texture. It gives a light, non-greasy skin feel and helps the formula spread easily. It also works as a solvent for other ingredients.
• Glyceryl Stearate: An emulsifier that helps oil and water stay mixed together. It also adds a soft, creamy texture and has mild emollient properties.
• Distarch Phosphate: A modified starch used as a texture and consistency agent. It helps create that smooth, even application feel and can absorb excess oil on the skin’s surface.
• Methylpropanediol: A glycol that acts as a humectant and solvent, helping to dissolve other ingredients and improve their absorption into skin.
• Glycyrrhiza Inflata Root Extract: This is licorice root extract, specifically an inflata species known for its glabridin content, which inhibits tyrosinase, the enzyme involved in melanin production.
• PEG-40 Stearate: A PEG-based emulsifier and surfactant that helps keep the formula stable and uniform.
• Sorbitan Stearate: Another emulsifier, this one working alongside PEG-40 Stearate to keep the oil and water phases together.
• Sodium Cetearyl Sulfate: A surfactant and emulsifier derived from fatty alcohols. It helps stabilise the emulsion and contributes to texture.
• Dimethicone: A silicone that creates a smooth, silky skin feel and forms a light, breathable barrier on the skin’s surface. It helps lock in moisture without suffocating skin and gives that polished, non-greasy finish.
• Acrylic Acid-VP Crosspolymer: A synthetic polymer used as a thickener and stabiliser.
• Xanthan Gum: A natural polysaccharide used as a thickener and stabiliser. It gives body to the formula and keeps the texture consistent.
• Trisodium EDTA: A chelating agent that binds to metal ions in the formula and prevents them from degrading the other ingredients – especially important for vitamin C, which oxidises in the presence of metal ions.
• 1,2-Hexanediol: A glycol that functions as both a humectant and a preservative booster.
• Piroctone Olamine: An antifungal agent used here as a preservative with antimicrobial properties.
• Phenoxyethanol: One of the most common preservatives in modern skincare. It keeps the product free from bacteria and mould over its shelf life.
• BHT: Butylated hydroxytoluene, an antioxidant used to protect the formula from oxidation.
• Parfum: Fragrance. It’s listed as a single ingredient but can be a blend of dozens of compounds, which is why it’s a common trigger for skin sensitivity and allergic reactions.

Texture

This serum has a watery, yellowish texture that sinks into your skin immediately. That yellowish tint is just the natural colour of the product, not a sign that Vitamin C is going back (if you see it going darker and darker with use, that is a sign it’s going bad).

Fragrance

Pretty neutral and forgettable. I would prefer if it weren’t here at all, as fragrance always has the potential to irritate sensitive skin (and this is no exception). But, at least, it’s quite inoffensive when it comes to actually smelling it.

Packaging

A white, 8 ml tube that lasts for 7 days. You can also buy a pack of 3.

How To Use It

• Remove foil (but leave the cap on).
• Press the button at the bottom of the bottle to release Vitamin C.
• Shake well for 10 seconds to activate the formula.
• Twist cap to remove it.
• Press the button again to release the product and use it.

I use it every morning after cleansing to supercharge the sun protection of my sunscreen (no, Vitamin C does NOT make skin more prone to sun damage).

Performance & Personal Opinion

Eucerin Hyaluron-Filler Vitamin C Booster sinks in quickly into my skin without leaving any greasy residue behind. It doesn’t sting either. 10% is a fairly low concentration and is unlikely to cause irritations. BUT, if your skin is particularly sensitive and throws a tantrum every time you use something new, even this low dose could be too much.

A little tingling is totally fine. Stinging, any kind of pain, redness or irritation is NOT. If you experience these symptoms, cut back to 2 or 3 times a week. As the formula stays fresh for the whole week, Vitamin C can do its best work. After every use, my skin is brighter and smoother. If you have any dark spots left behind by pimples, this’ll help you fade them away faster.

The only thing I don’t like? Studies show that Vitamin C works better when paired with fellow antioxidants Vitamin E and Ferulic Acid. Sadly, you won’t find them here. I guess Eucerin left them out to keep them price low. There’s always a trade-off, isn’t there?

Related: Is It Ok For Skincare Products To Tingle?

What I Like About Eucerin Hyaluron-Filler Vitamin C Booster

• The activation system keeps vitamin C stable until you actually use it
• Skin is visibly brighter after every single use
• Dark spots and post-breakout marks fade faster with consistent use
• Sinks in immediately with zero greasy residue
• Works under sunscreen without pilling or feeling like you’ve got three layers on your face
• Doesn’t sting

What I DON’T Like About Eucerin Hyaluron-Filler Vitamin C Booster

• No vitamin E or ferulic acid, and that’s a real miss
• Fragrance has no business being in a vitamin C product designed for daily use

Who Should Use This?

• This is a good fit if you’re newer to vitamin C and want results without the drama of high-concentration formulas.
• It’s also well-suited to normal, combination, or dry skin: the squalane and sodium hyaluronate give it enough hydration to pull double duty as a serum.
• If you have oily or acne-prone skin, isopropyl palmitate may break you out.
• And if your skin is genuinely sensitive or reactive, that fragrance is a wildcard. Patch test first, no exceptions.

Does Eucerin Hyaluron-Filler Vitamin C Booster Live Up To Its Claims?

Price & Availability

£20.00 at Boots, Look Fantastic, Sephora, and Walmart

Do You Need It?

If you can’t tolerate 15% L-Ascorbic Acid and are on a budget, this is a good option to consider.