Choosing Korean serums: a practical guide for every skin type and concern

Korean serums are popular because they often target one specific skin concern, such as dryness, a dull complexion, redness or visible pigmentation. However, attractive packaging or a long ingredients list does not guarantee that a facial serum is right for your skin. The right choice starts with the formula, the concentration of active ingredients and how you use the product.

Three pitfalls when buying a facial serum

1. A high concentration is not always the most practical choice

A serum with 10% niacinamide, 10% azelaic acid or 23% vitamin C may sound appealing, but a strong formula can cause stinging or dryness more quickly. This is particularly important with a serum for sensitive skin, where building up gradually is key. Start with a small amount and do not use the product every day straight away if the packaging recommends introducing it gradually.

2. Marketing claims are not the same as proven results

Words such as “glow”, “firming” and “anti-ageing” often describe the desired cosmetic effect. According to a brand’s own research, certain ingredients may improve the appearance of the skin, but this is not a guarantee for every individual. So look for verifiable information, such as the ingredients list, volume, directions for use and warnings.

A serum for pigmentation may contain ingredients that help the skin tone appear more even, but pigmentation does not automatically disappear. Daily sun protection remains important, particularly with serums containing vitamin C, retinal or azelaic acid.

3. Using too many active ingredients at once

Combining a vitamin C serum with retinal, exfoliating acids and a strong niacinamide serum can make your routine unnecessarily complicated. This makes it harder to tell which product suits you and which does not. Start by choosing one main goal and add new products one at a time.

Key points to check

1. Choose the active ingredient based on your goal

• Hyaluronic acid and panthenol: suitable for a hydrating serum or a serum for dry skin. They are often chosen for a more comfortable, smoother-feeling complexion.
• Niacinamide: commonly found in Korean skincare for uneven skin tone, visible pores and oily-looking skin. A niacinamide serum may also be suitable for oily or combination skin, depending on the overall formula.
• Azelaic acid: an azelaic acid serum is often chosen for redness, unsettled skin and an uneven complexion. Skin may initially react with dryness or sensitivity, so introducing it gradually is sensible.
• Vitamin C and tranexamic acid: used in formulas for a dull appearance and visible discolouration. With a vitamin C serum, the concentration and stability are important.
• Bakuchiol, peptides and retinal: suitable for anyone focusing on fine lines, skin texture or a firmer-looking complexion. Retinal and retinol require extra care when building up usage, as well as diligent sun protection.

2. Look at the complete formula, not just the hero ingredient

A serum containing a popular ingredient may still be less pleasant to use if its texture does not fit your routine. Look out for:

• Fragrance and alcohol: may be less suitable for some users with sensitive skin.
• Hydrating ingredients: glycerine, hyaluronic acid, beta-glucan and panthenol are useful if your skin is dry or feels tight.
• Barrier-supporting ingredients: ceramides, lecithin and squalane are found in some formulas designed to support comfort and moisture retention.
• Volume and shelf life: 30 ml is common for a facial serum. A larger bottle may seem better value, but only if you use the product within the recommended period.

Always check the ingredients list on the packaging. Product information may change, and the official packaging takes precedence.

3. Check the directions for use and compatibility

Usually apply a serum after cleansing and, if desired, toner, followed by a moisturiser. Wear sunscreen during the day when advised in the product information. Carry out a patch test before using a new formula. Stop using it if you experience persistent redness, swelling, itching or a burning sensation, and seek advice from a doctor or pharmacist if necessary.

Suitable for: Budget-conscious beginners

Numbuzin No.1 Pantothenic B5 Active Soothing Serum

Why it suits this profile: The 50 ml formula combines niacinamide, panthenol, pantothenic acid, glycerine and several forms of hyaluronic acid. This makes it a practical option for anyone wanting to try one hydrating serum without buying several products straight away.

How this product avoids the pitfall

The ingredients list shows several moisturising ingredients alongside active ingredients. The directions recommend applying it after cleansing, both morning and evening, followed by a moisturiser.

Main benefit & advantages

50 ml volume; panthenol, glycerine and several forms of hyaluronic acid in the formula.

Suitable for: Shoppers looking for premium quality

The 6 Peptide Skin Booster Serum

Why it suits this profile: The bottle contains 150 ml and the formula includes six types of peptides, niacinamide, glycerine and hyaluronic acid. This suits users looking for a generous booster to complement an extensive Korean skincare routine.

How this product avoids the pitfall

The product information states that it has a lightweight, non-sticky texture and clearly positions it after toner. This makes it easier to combine with a moisturiser.

Main benefit & advantages

150 ml volume; six peptides and hydrating ingredients in one booster formula.

Suitable for: Targeted use & intensive users

ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum

Why it suits this profile: This serum contains 10% azelaic acid, panthenol, betaine, niacinamide and hyaluronic acid. It is intended for users who want to target redness or an uneven complexion and are prepared to build up usage carefully.

How this product avoids the pitfall

The manufacturer explicitly states that you should start with 1 to 2 drops, once or twice a week. It also recommends keeping the skin sufficiently hydrated and wearing sunscreen during the day.

Main benefit & advantages

10% azelaic acid; also contains panthenol, allantoin, ceramide NP and sodium hyaluronate.

Suitable for: Fans of targeted glow care

Beauty Of Joseon Glow Deep Serum Rich + Alpha Arbutin

Why it suits this profile: The formula contains 68.6% rice bran water, 2% alpha-arbutin, niacinamide and panthenol. This makes it a good match for anyone looking for a lightweight serum for pigmentation and a dull complexion.

How this product avoids the pitfall

The ingredients and percentages are clearly stated. The recommended application is straightforward: apply a few drops to clean skin, followed by moisturiser.

Main benefit & advantages

30 ml volume; 2% alpha-arbutin and rice bran water in a fragrance-free formula, according to the product information.

Frequently asked questions about Korean serums

Which serum is suitable for dry skin?

Choose a hydrating serum with ingredients such as glycerine, panthenol, beta-glucan or hyaluronic acid. Follow with a moisturiser to help retain moisture more comfortably. A serum for dry skin does not have to feel heavy or greasy; focus primarily on the texture and the rest of your routine.

Can you use a niacinamide serum and a vitamin C serum together?

This depends on the formula, but it is not necessary to apply both at the same time. If you have sensitive skin, it may be better to use them at different times. Introduce new products separately so that you can more easily identify any irritation or dryness.

How long does a serum last after opening?

Shelf life varies from product to product. Check the expiry date and the open-jar symbol indicating the period after opening on the packaging. Serums containing unstable vitamin C may come with additional storage advice. For example, Vitamin C23 recommends refrigerated storage and use within two months of opening to help preserve the active ingredients.