Choosing Korean serums: how to find a facial serum for your skin

Korean serums are popular thanks to their lightweight textures, multiple active ingredients and wide choice for different skin concerns. However, it is not advisable to choose one based solely on eye-catching packaging, a high percentage or a promise of “glow”. The right facial serum starts with your skin type, the result you want to achieve and a formula you can introduce gradually.

Common pitfalls when choosing Korean skincare

1. A high percentage does not tell you everything

A niacinamide serum containing 10% sounds convincing, but a higher concentration is not automatically more comfortable for every skin type. The same applies to a vitamin C serum, azelaic acid or retinal. Therefore, check:

• which active ingredient is actually listed in the ingredients;
• how high up the ingredient appears on the list;
• whether supporting ingredients are included, such as panthenol, glycerine or ceramides;
• whether the instructions recommend introducing it gradually.

Product claims about, for example, a more even complexion, less visible blemishes or firmer-looking skin come from the brand. Do not regard them as guaranteed results. A brand’s own research may report certain effects, but your skin may respond differently.

2. Using too many active ingredients at once

Combining an acne serum, a serum for dark spots and an anti-ageing serum may seem efficient, but it can make your routine unnecessarily complicated. Salicylic acid, vitamin C, azelaic acid, retinal and retinol in particular require a careful introduction.

Ideally, start with one new product. Apply a small amount to a limited area of skin first and pay attention to the warnings on the packaging. Stop using it if you experience persistent redness, itching, swelling or a burning sensation, and ask a doctor or pharmacist for advice if you are unsure.

3. Forgetting hydration and sun protection

A serum usually does not replace a moisturiser. A hydrating serum containing hyaluronic acid, beta-glucan or glycerine can add moisture to the skin, while a cream helps to lock it in. For products containing vitamin C, retinal, retinol, acids or ingredients targeting pigmentation, broad-spectrum sunscreen during the day is important according to the product information.

Which specifications should you check?

Match active ingredients to your skin concern

Start by considering the concern you want to address:

• Dry skin: choose a hyaluronic acid serum with glycerine, panthenol, beta-glucan or ceramide NP.
• Sensitive skin or a serum for redness: look for soothing ingredients such as centella asiatica, allantoin, panthenol and dipotassium glycyrrhizate. Fragrance-free may be a practical preference.
• Blemishes: an acne serum may contain ingredients such as niacinamide, zinc PCA, salicylic acid or azelaic acid. These cosmetic products are not medicines.
• Dark spots and a dull complexion: look for niacinamide, tranexamic acid, alpha-arbutin and vitamin C derivatives. Use sun protection during the day.
• Fine lines: a peptide serum, bakuchiol serum or retinal serum may be worth considering. Retinal and retinol can increase sensitivity to the sun and require careful use.
• Weakened skin barrier: look for ceramides, cholesterol, panthenol, beta-glucan and simple hydrating formulas.

Concentration, texture and skin feel

A thin, watery formula often works well under moisturiser and sunscreen. A gel texture can feel pleasant on oilier skin, while a richer serum or a formula containing oils may offer greater comfort for dry skin.

Also consider the size: Korean serums are available in 15, 30, 50 or 100 ml formats. A smaller bottle is practical when trying an active ingredient for the first time. Check the expiry date, the period after opening and any changes in colour according to the packaging.

Label and instructions

Before buying, check the most recent ingredients list on the packaging. Product formulas may change. Also pay attention to:

• warnings regarding the eyes, damaged skin and children;
• recommended time of use, such as evenings only;
• storage instructions, including protection from direct sunlight;
• whether the formula contains fragrance or alcohol if you prefer to avoid these ingredients;
• the need for sun protection when using retinal, retinol, vitamin C or exfoliating ingredients.

Our recommendations by user profile

Suitable for: Shoppers looking for premium quality

Torriden DIVE IN Low Molecule Hyaluronic Acid Serum 50ml

Why it suits this profile: Suitable for users looking for a more comprehensive hydrating serum containing several moisture-binding ingredients.

How this product avoids the pitfall

The product description mentions five types of hyaluronic acid, as well as panthenol, beta-glucan and ceramide NP. Check the current packaging for the latest formula.

Key benefit & highlights

50 ml; fragrance-free formula according to the product information; contains ceramide NP and panthenol.

Suitable for: Targeted use & intensive users

ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum 30ml

Why it suits this profile: For anyone specifically interested in azelaic acid, redness and skin that may react sensitively to active ingredients.

How this product avoids the pitfall

The instructions recommend starting with 1–2 drops once or twice a week. This helps introduce 10% azelaic acid gradually.

Key benefit & highlights

10% azelaic acid; panthenol, allantoin and sodium hyaluronate; clear instructions for gradual introduction.

Suitable for: Shoppers focused on dark spots

ANUA Niacinamide 10% + TXA 4% Serum 30ml

Why it suits this profile: A targeted option for anyone looking for a serum for dark spots, post-acne marks and an uneven complexion.

How this product avoids the pitfall

The key active ingredients are clearly stated: 10% niacinamide and 4% tranexamic acid. Use sun protection and assess how your skin responds before expanding your routine.

Key benefit & highlights

Niacinamide and tranexamic acid; also contains alpha-arbutin, panthenol and several forms of hyaluronic acid.

How to use a Korean serum in your routine

1. Cleanse your face and use a toner if desired.
2. Apply a small amount of serum to dry or slightly damp skin, depending on the instructions.
3. Wait briefly when applying several layers and watch out for pilling.
4. Finish with a moisturiser.
5. During the day, use sunscreen with an appropriate level of protection.
6. Introduce active serums one at a time and reduce the frequency if irritation occurs.

A vitamin C serum, peptide serum or hyaluronic acid serum can usually be added easily to an existing routine. According to the label, a retinal serum is generally used in the evening and introduced gradually. Do not simply combine several powerful active ingredients.

Frequently asked questions about Korean serums

How long does a bottle of facial serum last?

That depends on the amount it contains and how you use it. A 30 ml bottle used with a few drops at a time will often last longer than when you apply a generous amount to your entire face and neck. Follow the period-after-opening symbol and store the product as directed, usually in a cool place away from direct sunlight.

Which serum is suitable for sensitive skin?

Look for a short, straightforward ingredients list containing ingredients such as panthenol, beta-glucan, glycerine, centella asiatica or ceramide NP. Avoid introducing retinal, retinol, acids or high concentrations too quickly. Test the product on a small area of skin first and check whether the formula contains fragrance or alcohol.

Can you combine an acne serum with a serum for dark spots?

Sometimes, but it is not essential. Start with one product and only add a second later if your skin remains calm. Pay particular attention to whether both serums contain acids, niacinamide, vitamin C or other active ingredients. For persistent acne, severe redness or changes in pigmentation, professional medical advice is more appropriate than layering multiple cosmetic serums.