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Choosing a face serum: a practical guide to hydration, pigmentation and sensitive skin

A face serum can be a targeted addition to your skincare routine. However, it’s best not to rely on words such as “glow”, “anti-ageing” or “clinically proven” alone. The right choice depends mainly on the ingredients, concentration, how well your skin tolerates it and how you use it.

Common mistakes when buying a serum

1. Assuming a long ingredients list means a better formula

A serum with lots of active ingredients may seem appealing, but several potent ingredients can put unnecessary stress on your skin. For example, a vitamin C serum with pure ascorbic acid, salicylic acid and fragrance needs more careful consideration if you have sensitive skin than a simple hydrating formula.

Start by thinking about your main skincare goal:

  • Dryness: glycerin, panthenol, hyaluronic acid and ceramides.
  • Dull-looking skin: vitamin C, niacinamide or alpha-arbutin.
  • Pigmentation or dark spots: alpha-arbutin, tranexamic acid or azelaic acid.
  • Redness and sensitivity: panthenol, centella asiatica, allantoin and a fragrance-free formula.
  • Fine lines: peptides, bakuchiol or retinal. It’s important to introduce these gradually.

2. Treating a brand’s claim as a guaranteed result

Claims about a more even-looking complexion, less visible pores or firmer skin won’t necessarily mean the same thing for everyone. A brand’s own research may measure certain results under specific conditions. Check the full product information, ingredients list and any usage restrictions.

A serum for pigmentation also doesn’t replace sun protection. Daily use of a broad-spectrum sunscreen helps prevent discolouration caused by UV exposure from becoming more noticeable again.

3. Using too many active products at once

Combining a niacinamide serum with a vitamin C serum, exfoliant and retinoid can be too much for some skin types. Ideally, introduce one new product at a time. First, test a small amount on a limited area of skin, then gradually increase how often you use it, especially if it’s a serum for sensitive skin.

Key points to check before buying

Active ingredients and concentration

An ingredient’s position in the ingredients list gives you an initial idea of how much is included, but it doesn’t tell you everything about how the finished product will perform. Look for specific details such as 2% alpha-arbutin, 10% azelaic acid, 12% pure vitamin C or 5% panthenol.

A higher concentration isn’t automatically a better choice. A hydrating serum with a simple formula may be more practical for everyday use than a highly concentrated serum that is more likely to cause irritation.

Skin type, texture and other ingredients

A watery lotion or gel usually absorbs quickly and works well under make-up. A richer formula with oils, squalane or ceramides may feel more comfortable on dry skin. If you have sensitive skin, check whether the product contains fragrance, drying alcohol or known allergens.

Also look out for product claims such as vegan, fragrance-free, alcohol-free and dermatologically tested. Treat these as product specifications, not a guarantee that everyone will tolerate the product without any problems.

Packaging, shelf life and use

Vitamin C and retinal are sensitive to light and air. Store these products as directed on the packaging and make sure the dropper or pump is properly closed. Avoid touching your skin with the dropper to help prevent contamination.

Usually, apply a serum after cleansing and, if you use one, a toner. Follow with a moisturiser. When using active ingredients such as azelaic acid, vitamin C or retinal, it’s advisable to wear sun protection during the day. Always follow the official label, as ingredients and instructions for use may change.

Which option suits your skincare goal?

Suitable for: Budget-conscious beginners
Beauty Of Joseon Glow Deep Serum Rich + Alpha Arbutin 30ml

Beauty Of Joseon Glow Deep Serum Rich + Alpha Arbutin 30ml

Why it suits this profile: A straightforward option if you’d like to try a Korean skincare serum focused on hydration and a more even-looking complexion.

How this product avoids the pitfall

The product information gives a clear breakdown of the formula, including 68.6% rice bran water, 2% alpha-arbutin and niacinamide. According to the product specifications, the formula is vegan, fragrance-free and alcohol-free.

Key benefits and features

30 ml; lightweight texture; targets dryness and dull-looking skin; recommended for evening use.

Suitable for: Targeted use and regular serum users
ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum 30ml

ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum 30ml

Why it suits this profile: A good fit if you’re specifically looking for a serum to address redness or dark spots and are prepared to introduce it carefully.

How this product avoids the pitfall

The instructions recommend starting with 1–2 drops, once or twice a week. The product information also warns that it may cause dryness and recommends using sunscreen during the day.

Key benefits and features

30 ml; 10% azelaic acid; contains panthenol, allantoin, centella and ceramide NP; fragrance-free according to the listed specifications.

Suitable for: Sensitive skin in need of comfort
Beauty Of Joseon Calming Serum Green Tea + Panthenol Green 30ml

Beauty Of Joseon Calming Serum: Green Tea + Panthenol Green 30ml

Why it suits this profile: A natural choice if your main priorities are hydration and a soothing feel, without fragrance in the formula.

How this product avoids the pitfall

The product specifications list 5% panthenol, green tea, allantoin and a fragrance-free formula. The recommended amount is 2–3 drops, so you can start gradually.

Key benefits and features

30 ml; vegan and alcohol-free according to the product information; contains sodium hyaluronate and panthenol; lightweight, fast-absorbing texture.

Looking for more options?

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

How to use a face serum

  1. Cleanse your face and gently pat your skin dry.
  2. Apply one to a few drops, depending on the label.
  3. Avoid the eye area and broken skin unless the manufacturer says otherwise.
  4. Follow with a moisturiser.
  5. Apply sunscreen during the day, especially when using vitamin C, acids or retinal.
  6. Stop using the product if itching, swelling or a burning sensation persists, and seek medical advice if needed.

Frequently asked questions about face serums

When should you apply a face serum?

Usually after cleansing and before moisturiser. A watery serum generally goes on before a richer cream. Always check the specific instructions, as some products are recommended for evening use only or for less frequent application.

How long does a bottle of serum last?

It depends on the amount in the bottle and how many drops you use each time. A 30 ml bottle may last from several weeks to a few months with daily use. Use the recommended amount; applying more won’t necessarily speed up results.

Can you combine several serums?

You can, but introduce new active ingredients one at a time. Don’t combine several potent products, such as a vitamin C serum, exfoliant and retinal, without building up gradually. A hydrating serum with panthenol or hyaluronic acid is often easier to combine with other products. If irritation occurs, check which step you added most recently.