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Choosing a face serum: a practical guide to skin type, ingredients and use

A face serum can be a useful addition to your daily routine, but not every product suits every skin type. A hydrating serum works differently from a serum for pigmentation, while a retinol serum requires more care when building up usage and with sun protection. Focusing solely on a prominent promise on the packaging could therefore lead you to spend money unnecessarily.

Common pitfalls when buying a serum

1. Mistaking a high concentration for a better choice

A percentage does not tell you everything. For example, a vitamin C serum with 23% ascorbic acid contains a high concentration, but may be less practical for beginners or sensitive skin. Similarly, a niacinamide serum with 15% is not automatically more suitable than a formula with a lower percentage.

So pay attention to:

  • the type of active ingredient;
  • the full ingredients list;
  • warnings and recommended frequency of use;
  • the texture and amount of product.

2. Combining several strong ingredients at once

Retinol, retinal, vitamin C, azelaic acid and exfoliating acids can all have a place in a skincare routine. However, using several intensive products at the same time makes it harder to identify which product your skin does not tolerate well.

Ideally, start with one new serum. First test a small amount on a limited area of skin, then gradually increase use if your skin remains calm.

3. Treating a marketing claim as a guaranteed result

Words such as “anti-ageing”, “glass skin” or “deep action” often describe a brand’s positioning. They do not guarantee the same result for every user. A brand’s own research may mention certain improvements, but you should also check the product details, ingredients and safety information.

Which specifications are important?

Skin type and goal

First, decide on your main goal. For dry or dehydrated skin, glycerine, panthenol, ceramides and hyaluronic acid are practical ingredients to look for. A hyaluronic acid serum mainly helps your skin feel comfortable and supple; its effects also depend on the rest of your routine and on applying a cream afterwards.

For a dull or uneven complexion, you could look for a vitamin C serum, niacinamide, tranexamic acid or a combination containing centella asiatica. A serum for pigmentation is not a substitute for daily sun protection. Without protection from UV radiation, discolouration may continue to reappear visibly.

For oily or unsettled skin, lightweight textures are often more comfortable. A niacinamide serum or azelaic acid serum may suit those looking to care for excess sebum, redness or an uneven appearance. These are cosmetic product properties; persistent skin concerns should be discussed with a doctor or skincare professional.

Active ingredients and strength

An anti-ageing serum usually focuses on the appearance of fine lines, a smoother-looking skin surface or firmer-looking skin. Retinol and retinal are vitamin A derivatives. Use a retinol serum in the evening as a general rule, start with a low frequency and follow the instructions on the packaging. Products containing retinol or retinal can increase sensitivity to the sun. During the day, use a broad-spectrum sunscreen with at least SPF 30.

Bakuchiol is often positioned as an alternative to retinol. According to EQQUALBERRY’s product description, the serum contains 5000 ppm bakuchiol and 4% niacinamide. These are verifiable product specifications, but suitability still depends on your skin and expectations.

Shelf life, packaging and quantity

Serums are often available in sizes of 9, 15, 20, 30 or 55 ml. A small bottle can be useful for trying an active ingredient first, while 30 ml is a common amount for regular use.

Always check:

  • the expiry or opening information on the packaging;
  • whether the product should be stored somewhere cool and away from direct sunlight;
  • whether a vitamin C formula needs to be sealed particularly carefully;
  • the recommended amount per application.

Vitamin C23, for example, states that the product should be refrigerated after opening and preferably used within two months. Always follow the current packaging, as instructions may vary from one product to another.

Recommendations by user profile

Suitable for: Budget-conscious beginners
Cosrx The 6 Peptide Skin Booster Serum 150 Ml

The 6 Peptide Skin Booster Serum 150 Ml

Why it suits this profile: The generous 150 ml size and lightweight formula make this an accessible choice for anyone wanting to start using a face serum.

How this product avoids the pitfall

The formula is not based on a single highly concentrated active ingredient. This makes the routine easier for beginners to understand.

Key benefit & advantages

Contains six types of peptides, niacinamide, glycerine and sodium hyaluronate. Suitable for use in the morning and evening according to the product instructions.

Suitable for: Shoppers seeking premium quality
Estée Lauder Advanced Night Repair Serum Synchronized Multi-Recovery Complex 30ml

Estée Lauder Advanced Night Repair Serum Synchronized Multi-Recovery Complex 30ml

Why it suits this profile: A premium routine user looking for one versatile serum for hydration, smoother-looking skin and a comfortable evening routine.

How this product avoids the pitfall

The product information states that the formula is oil-free and fragrance-free. This makes two important checks immediately clear for those with sensitive-skin preferences.

Key benefit & advantages

Contains hyaluronic acid and is designed for all skin types. According to the product description, Chronolux Power Signal Technology supports overnight skincare.

Suitable for: Targeted use & intensive users
SKIN1004 Madagascar Centella Retinol 0.2 Boosting Shot Ampoule 9ml

SKIN1004 Madagascar Centella Retinol 0.2 Boosting Shot Ampoule 9ml

Why it suits this profile: For users who consciously want to introduce a retinol serum into their routine and are prepared to build up usage gradually.

How this product avoids the pitfall

The usage instructions recommend an adjustment phase of two to three times a week and evening use only.

Key benefit & advantages

Contains 0.2% retinol, retinal, sodium hyaluronate, panthenol and madecassoside. Daily sunscreen is recommended in the safety information.

Suitable for: Targeted care for pigmentation
ANUA NIACINAMIDE 10% + TXA 4% SERUM 30ml

ANUA NIACINAMIDE 10% + TXA 4% SERUM 30ml

Why it suits this profile: For anyone looking for a serum for pigmentation and a more even-looking complexion, with a lightweight texture for daily use.

How this product avoids the pitfall

The combination and concentrations are clearly stated: 10% niacinamide and 4% tranexamic acid. This means you do not have to rely solely on a general claim.

Key benefit & advantages

Also contains alpha-arbutin, several forms of hyaluronic acid, panthenol and ceramide. According to the product specifications, the formula is fragrance-free and alcohol-free.

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 remove make-up or sunscreen.
  2. Apply toner if you use one.
  3. Apply a few drops of serum to slightly damp or dry skin, depending on the packaging instructions.
  4. Finish with a moisturiser.
  5. Apply sunscreen in the morning, especially when using retinol, retinal, vitamin C or azelaic acid.

A Korean skincare serum often works well in a routine with several lightweight layers. Apply products from lightest to richest, and do not introduce several new formulas on the same day.

Frequently asked questions about face serums

Which face serum is suitable for sensitive skin?

Look for a fragrance-free formula with a simple ingredient list, and initially avoid high concentrations or several active ingredients. A serum for sensitive skin should feel comfortable first and foremost. Stop using it if redness, itching or a burning sensation persists, and follow the safety information on the packaging.

Can I use a retinol serum and vitamin C serum together?

This can work in some routines, but it is best to use them at different times: vitamin C in the morning and retinol in the evening. Start slowly and do not immediately combine them with other strong active ingredients. Sunscreen during the day remains important.

How long does a bottle of serum last?

This depends on the amount it contains and the number of drops used per application. A 30 ml bottle will generally last longer with daily use than a 9 ml ampoule. Check the product’s shelf life after opening and store it as directed. With vitamin C, careful storage may be particularly important.