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

A face serum can be a useful addition to your daily routine, but a high price or long ingredients list does not automatically mean the product is right for your skin. Many consumers buy based on an eye-catching claim, only to experience tightness, pilling under make-up or irritation.

Pay particular attention to these three common pitfalls:

• A higher percentage is not always better. A formula with 10% azelaic acid or niacinamide may be appealing, but it sometimes needs to be introduced gradually.
• “For all skin types” means little without an ingredients list. Also look at fragrance, alcohol, oils, acids and soothing ingredients.
• A serum does not replace moisturiser or sun cream. Many serums add moisture, but a cream helps to lock it in more effectively. During the day, broad-spectrum sun cream remains important, especially when using routines with active ingredients.

Which specifications should you check before buying?

1. Choose the main goal of your routine

Start with one clear skin concern. This helps prevent you from using several active serums at the same time.

• Dry or dehydrated skin: look for a hydrating serum with hyaluronic acid, glycerine, panthenol or beta-glucan.
• Sensitive or easily irritated skin: a serum for sensitive skin containing Centella, panthenol, allantoin or green tea may be a gentler choice.
• Red-looking skin: a redness serum with soothing ingredients such as Centella or azelaic acid may be a better fit. These are cosmetic skincare claims, not medical treatments.
• Blemishes: with an anti-spot serum, it is important to check whether it contains acids or other active ingredients. Introduce these gradually.
• Dull complexion or visible dark spots: a dark-spot serum with vitamin C, niacinamide, tranexamic acid or arbutin is intended to promote a more even-looking complexion. Results vary from person to person.

2. Pay attention to the combination of active ingredients

A K-beauty serum or product within Korean skincare may combine several extracts. That sounds appealing, but more ingredients do not automatically mean a better match.

Check the INCI list and look out for these familiar combinations:

• Hyaluronic acid serum: helps bind moisture to the skin’s surface. Apply moisturiser afterwards.
• Niacinamide serum: often used to promote a more even-looking complexion and support the skin barrier.
• Vitamin C serum: intended to promote brighter-looking skin. Some forms are gentler than pure ascorbic acid.
• Azelaic acid serum: may suit skin that looks unsettled or uneven, but it can cause tingling or dryness at first.
• Centella serum: popular for a soothing, lightweight routine.
• Panthenol, ceramide and beta-glucan: practical ingredients when moisture retention and comfort are the priority.

Do not immediately combine several acids, vitamin C and retinoids if your skin is not used to them. Test a new face serum on a small area first and stop using it if you experience persistent redness, swelling, itching or a burning sensation.

3. Check the contents, shelf life and directions for use

A 30 ml bottle is common, while 50, 55 or 100 ml ampoules last longer. Do not only look at the price per pack; also consider:

• Net contents: for example, 30 ml, 50 ml or 100 ml.
• Dosage: usually 2 to 3 drops are sufficient.
• Storage: many formulas should be kept in a cool, dry place away from direct sunlight.
• Shelf life after opening: follow the packaging instructions and check the batch and expiry dates.
• Packaging: a pump bottle limits contact with air and hands; a pipette makes dispensing easy, but make sure it is closed properly.

Ingredients may change. Always check the ingredients list on the packaging you receive. When using a product with active ingredients, wearing sun cream during the day is a sensible step. Avoid using it on open, damaged or severely irritated skin.

Recommended face serums by user profile

Suitable for: Budget-conscious beginners

SKIN1004 Madagascar Centella Ampoule 55 ml

Why it suits this profile: A straightforward choice for anyone wanting to start with a lightweight, hydrating Centella formula without using several strong active ingredients at once.

How this product avoids the pitfall

The product description highlights Centella and moisture, helping you keep your routine clear and manageable.

Key benefit & highlights

55 ml contents; lightweight ampoule texture according to the product information; suitable for a short, simple routine.

Suitable for: Shoppers seeking premium quality

Torriden DIVE IN Low Molecule Hyaluronic Acid Serum 50ml

Why it suits this profile: Ideal for anyone primarily seeking hydration and valuing a formula with several moisturising ingredients.

How this product avoids the pitfall

The description lists five types of hyaluronic acid and also mentions panthenol, ceramide NP and beta-glucan.

Key benefit & highlights

50 ml contents; fragrance-free according to the product information; combination of hyaluronic acid, panthenol and ceramide NP.

Suitable for: Targeted use & intensive users

ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum 30ml

Why it suits this profile: For users specifically looking for an azelaic acid serum who are prepared to build up usage gradually.

How this product avoids the pitfall

The directions recommend starting with 1 to 2 drops, 1 to 2 times a week. This helps prevent rushed use of an active formula.

Key benefit & highlights

10% azelaic acid according to the product name; contains panthenol, glycerine, sodium hyaluronate and ceramide NP, among other ingredients; 30 ml.

Suitable for: Gentle daily skincare

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

Why it suits this profile: A natural option for anyone wanting to combine Korean skincare with a simple routine focused on moisture and comfort.

How this product avoids the pitfall

The ingredients list and product information mention green tea, Centella and panthenol, so you do not need to combine several exfoliating acids.

Key benefit & highlights

According to the product information, 5% panthenol and 50.9% green tea water; 30 ml; use 2 to 3 drops.

How to use a face serum

1. Cleanse your face and apply toner if desired.
2. Apply a small amount of serum to the skin.
3. Wait briefly, then apply moisturiser.
4. In the morning, use sun cream offering broad-spectrum protection.
5. Introduce only one new active product at a time.

Frequently asked questions about face serum

How often should you use a face serum?

That depends on the formula. A hydrating serum can often be used daily according to the label. With azelaic acid, vitamin C or other active ingredients, it is wiser to build up usage gradually. Always follow the brand’s directions for use.

Can a face serum replace day cream?

Usually not. A serum is generally lightweight and focused on specific ingredients. A moisturiser helps to retain moisture and provides an additional layer of care. During the day, a separate sun cream offers extra protection against UV radiation.

How long does a bottle of serum last?

That depends on the contents and dosage. Using 2 to 3 drops per application, a 30 ml bottle can last for several weeks. Close a pipette or pump securely, store the product away from direct sunlight and follow the shelf-life information on the packaging.