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Choosing a face serum: how to find a formula that suits your skin

A face serum can be a useful addition to your daily skincare routine. However, it is not wise to rely solely on terms such as “glow”, “boost” or “intensive action”. The right choice mainly depends on your skin type, the ingredients and how often you want to use the product.

Common pitfalls when choosing a face serum

1. Mistaking a long ingredients list for a better formula

A serum containing lots of active ingredients may sound appealing, but several potent ingredients can also be difficult to combine. Think of vitamin C, retinol, acids and niacinamide in one routine. So, do not just check which ingredients are present; also look at their concentration and the directions for use.

2. Using a hydrating serum without moisturiser

According to the product description, ingredients such as hyaluronic acid, glycerine and beta-glucan help attract or retain moisture. However, a serum for dry skin will generally work better if you apply moisturiser afterwards. This additional layer helps support the skin’s comfort and moisture balance.

3. Using active ingredients during the day without sun protection

Products containing retinol, retinal or a high concentration of vitamin C often carry a warning about increased sensitivity to sunlight. This is not a detail to overlook. During the day, use a broad-spectrum sunscreen and always follow the instructions on the packaging.

Also check the expiry date, batch information and current ingredients list. Manufacturers may change their formulas, so the packaging is the most up-to-date source of information.

Which features should you check?

1. The key ingredient should match your goal

First, identify your main skin concern:

  • Dry or tight-feeling skin: look for a hyaluronic acid serum, beta-glucan, glycerine, panthenol or ceramides.
  • Dull complexion or visible pigmentation: a vitamin C serum, niacinamide serum, alpha-arbutin or tranexamic acid may suit what you are looking for.
  • Redness or unsettled skin: look for panthenol, allantoin, centella asiatica and a simple formula.
  • Oily or blemish-prone skin: niacinamide, zinc or a product containing salicylate may be worth considering. These are cosmetic ingredients; they are not a substitute for medical advice.
  • Fine lines and mature skin: look for peptides, retinal or retinol. Introduce retinoids gradually and use them according to the instructions.
  • A weakened skin barrier: choose hydrating and supportive ingredients such as ceramide NP, panthenol and beta-glucan.

A Korean face serum or K-beauty serum is not automatically suitable for every skin type. Its origin matters less than the full ingredients list and the recommended use.

2. Consider the strength and frequency of use

A product containing 10% azelaic acid, 10% niacinamide or 23% ascorbic acid requires more care than a simple hydrating serum. When using an intensive formula, start with a small amount and use it infrequently. Increase use only if your skin tolerates the product well.

With a retinol serum or retinal product, introducing it gradually is especially important. According to the product information, the celimax product below contains 0.1% pure retinal and is intended for evening use. Do not use several potent active serums at the same time without first checking whether the combination is suitable.

3. Check the texture, size and storage instructions

A lightweight gel texture may feel comfortable on oily or combination skin, while a slightly richer formula may be better suited to dry skin. Also consider the size:

  • 15 to 20 ml is convenient for a concentrated product or occasional use.
  • 30 ml is a standard size for daily use.
  • 50 ml or 150 ml may offer better value if you use the serum generously and regularly.

Some formulas have specific storage recommendations. According to the product information, Vitamin C23 should be stored in the refrigerator and preferably used within two months of opening. Always follow the brand’s instructions and check the packaging.

Our recommendations by user profile

Suitable for: Budget-conscious beginners
The Ordinary Niacinamide 10% + Zinc 1% 30 ml

The Ordinary Niacinamide 10% + Zinc 1% 30 ml

Why it suits this profile: A straightforward choice for anyone wanting to try a niacinamide serum and build their routine step by step.

How this product avoids the pitfall

The product information clearly states 10% niacinamide and 1% zinc. Do not use it at the same time as certain vitamin C formulas; alternating them is recommended.

Key benefit & advantages

30 ml, unisex and suitable for several skin types according to the product specifications.

Suitable for: Buyers seeking premium quality
Cosrx The 6 Peptide Skin Booster Serum 150 ml

The 6 Peptide Skin Booster Serum 150 ml

Why it suits this profile: A generous-sized booster for anyone wanting to combine peptides and hydration in a regular morning or evening routine.

How this product avoids the pitfall

The formula focuses on one clear combination: six types of peptides, hydrating ingredients and niacinamide.

Key benefit & advantages

150 ml size, six peptide variants and use after toner according to the product information.

Suitable for: Targeted use & intensive users
celimax THE VITA-A RETINAL SHOT TIGHTENING BOOSTER 15 ml

celimax THE VITA-A RETINAL SHOT TIGHTENING BOOSTER 15 ml

Why it suits this profile: For users specifically looking for a retinal serum who are prepared to build their routine carefully.

How this product avoids the pitfall

The instructions recommend starting every other evening, using a small amount of product and reducing the frequency if irritation occurs.

Key benefit & advantages

According to the product description, it contains 0.1% retinal and 3% Matrixyl 3000. The product is intended for night-time use.

Suitable for: Fans of simple hydration
Torriden DIVE IN Low Molecule Hyaluronic Acid Serum 50 ml

Torriden DIVE IN Low Molecule Hyaluronic Acid Serum 50 ml

Why it suits this profile: A sensible option for anyone mainly looking for a hydrating serum for daily use, which is fragrance-free according to the product description.

How this product avoids the pitfall

The formula focuses on hydration with five types of hyaluronic acid, rather than a large number of exfoliating active ingredients.

Key benefit & advantages

50 ml, fragrance-free according to the product information, and enriched with panthenol, ceramide NP and beta-glucan.

Looking for more options?

We have put together a complete, up-to-date list of products that fully meet these strict selection criteria and the applicable European safety regulations.

How to use a face serum in your routine

  1. Cleanse your face and use toner if desired.
  2. Apply one to a few drops of serum to your skin.
  3. Apply moisturiser afterwards.
  4. Finish your morning routine with sun protection.
  5. Introduce new active ingredients one at a time.

If you have sensitive skin, carry out a patch test first. Stop using the product if you experience persistent redness, itching, swelling or a burning sensation, and seek medical advice if necessary. Do not use any product on damaged skin.

Frequently asked questions about face serums

When should you apply face serum?

You will usually apply a face serum after cleansing and, if desired, after toner, but before moisturiser. The exact order may vary by product. A retinal serum is generally intended for evening use; always check the label.

How long does a serum last after opening?

This varies by formula. Check the expiry date and the symbol indicating the period after opening, such as 12M. With vitamin C, the storage method may be particularly important. For example, Vitamin C23 recommends refrigeration and use within two months of opening to preserve the formula.

Can you use several serums at the same time?

Sometimes, but combine active ingredients with care. A hydrating hyaluronic acid serum is generally easier to combine than retinol, retinal, strong vitamin C or exfoliating acids. Start with one new product and only add another later if your skin remains calm.