Joybuy Insights

How to choose a serum for pigmentation: compare ingredients and avoid buying the wrong product

Pigmentation, post-acne marks and a dull complexion do not automatically disappear just because a serum has eye-catching packaging or a high percentage on the label. When buying a serum for pigmentation, it is better to consider the complete formula, how easy it is to use and how well the product suits your own skin.

As a Joybuy Product Recommendation Officer, I mainly filter marketing language from verifiable product information. Below, you can read about the pitfalls that often lead to buying the wrong product, which specifications matter and which popular choices suit different skin needs.

Common pitfalls when choosing a serum for dark spots

1. A high percentage does not tell you everything

A high-percentage vitamin C serum may seem appealing, but a higher concentration can also feel less comfortable on sensitive or reactive skin. There are also different forms of vitamin C. A stable derivative, such as ascorbyl glucoside or 3-O-ethyl ascorbic acid, is not the same as pure ascorbic acid.

So do not just look at the percentage. Also check:

  • The exact form of the active ingredient.
  • Where the ingredient appears in the ingredients list.
  • Storage advice and shelf life after opening.
  • Additional hydrating or soothing ingredients.

2. “Brightening” is sometimes mistaken for an instant solution

The terms brightening serum, “glow” and “even complexion” often describe a product’s cosmetic purpose. They do not guarantee that a mark will disappear completely. According to the brands’ own product information, some formulas are intended to help reduce the appearance of dark marks, dullness or an uneven complexion. Results may vary depending on your skin and skincare routine.

Be cautious with products that make big claims about “melanin”, “scars” or “anti-ageing”. A cosmetic serum is not a medical treatment. If pigmentation appears suddenly, changes or persists, it is wiser to seek advice from a GP or dermatologist.

3. Not paying attention to sun protection

A serum for hyperpigmentation is often used in the morning or evening, but sun exposure remains an important factor in visible discolouration. Follow the instructions for use and apply a sunscreen offering appropriate protection during the day. This is particularly relevant for formulas containing vitamin C derivatives, exfoliating ingredients or a high concentration of active ingredients.

Which specifications should you compare?

1. Choose the ingredient based on your goal

  • Alpha-arbutin serum: worth considering if you want to target dark marks and an uneven complexion. Products such as The Ordinary Alpha Arbutin 2% + HA list 2% alpha-arbutin and hyaluronic acid.
  • Niacinamide serum: often chosen to address an uneven complexion, oilier skin and a weakened skin barrier at the same time. Check the concentration; 10% may feel intense for some users.
  • Vitamin C serum: suitable for a dull-looking complexion. Check whether it contains pure vitamin C or a derivative, and follow the storage advice.
  • Tranexamic acid serum: commonly found in formulas for pigmentation and post-acne marks. Its performance should not be assessed separately from the rest of the formula.
  • Azelaic acid: frequently used in routines for reactive or oily skin. If you have sensitive skin, start with less frequent use if recommended on the packaging.

2. Check your skin type and the texture

A watery formula often feels lightweight and may be comfortable for combination or oily skin. A gel-like or milky texture may be a better fit if you are also looking for hydration. A serum for all skin types is not automatically suitable for everyone: fragrance, alcohol, oils or a high concentration of active ingredients may not work well for every individual.

3. Pay attention to stability and shelf life

Check the expiry date, the period after opening and the storage instructions. For example, Vitamin C23 serum states that it should be refrigerated and used within two months of opening to maintain product quality. This makes such a formula less practical if you are looking for a straightforward product to keep in your bathroom cabinet.

Always carry out a patch test before using a new serum. Do not introduce several new active products at the same time. This makes it easier to identify which product may have caused a reaction.

Recommended choices for different user profiles

Suitable for: Budget-conscious beginners
The Ordinary Alpha Arbutin 2% + HA 60ml

The Ordinary Alpha Arbutin 2% + HA 60ml

Why it suits this profile: The watery formula contains 2% alpha-arbutin and hyaluronic acid. At 60 ml, it is a practical choice for anyone looking for a simple first routine.

How this product avoids the pitfall

The ingredients and concentration are clearly stated, so you do not have to rely solely on a general “glow” claim.

Key benefit & highlights

2% alpha-arbutin, hyaluronic acid, a lightweight texture and a 60 ml size.

Suitable for: Shoppers seeking premium quality
SKIN1004 Madagascar Centella Tone Brightening Capsule Ampoule 50ml

SKIN1004 Madagascar Centella Tone Brightening Capsule Ampoule 50ml

Why it suits this profile: The formula combines niacinamide, tranexamic acid, centella asiatica and a vitamin C derivative for anyone wanting to address several aspects of an uneven complexion.

How this product avoids the pitfall

The ingredients list makes it clear that this is not a single-ingredient alpha-arbutin serum, but a broader combination for complexion and hydration.

Key benefit & highlights

50 ml size, a lightweight ampoule texture and several named active ingredients.

Suitable for: Targeted use & intensive users
Cosrx Vitamin C23 Anti ageing serum 20ml

Vitamin C23 Anti ageing serum 20ml

Why it suits this profile: According to the product information, this serum contains 23% ascorbic acid and requires refrigerated storage. It suits users who can follow the storage advice and use it within a short period.

How this product avoids the pitfall

The label states the high concentration, refrigerated storage requirement and advice to use the product within two months of opening.

Key benefit & highlights

23% pure vitamin C, a 20 ml size and clear storage instructions.

Suitable for: Sensitive or easily reactive skin
Dr. Althea Gentle Vitamin C Serum 30ml

Dr. Althea Gentle Vitamin C Serum 30ml

Why it suits this profile: The product description mentions a watery texture, vitamin C, niacinamide and a formula without fragrance or colourants.

How this product avoids the pitfall

The formula focuses on more than brightening, also highlighting its lightweight texture and lack of fragrance.

Key benefit & highlights

30 ml size, vegan according to the product information, fragrance-free and with a non-sticky texture.

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 build a simple routine

  1. Cleanse your face and pat your skin dry.
  2. Apply a few drops of serum according to the packaging.
  3. Follow with a moisturiser if your skin needs extra comfort.
  4. Apply sun protection during the day.
  5. Introduce one new active product at a time and, if you have sensitive skin, begin with less frequent use.

Do not immediately combine several strong products, such as a high-dose vitamin C serum, retinol and exfoliating acids. Stop using the product if irritation persists and consult a doctor if you are unsure.

Frequently asked questions about serums for pigmentation

Which serum is suitable for post-acne marks?

That depends on your skin type and the rest of your routine. A serum for acne marks may contain niacinamide, tranexamic acid, alpha-arbutin or azelaic acid. Choose one formula to start with and check the fragrance, alcohol content and total amount of active ingredients.

How long does it take for a serum for dark spots to show a visible difference?

Cosmetic results vary from person to person. Use the product consistently according to the packaging and do not assess your skin after just a few days. Taking photos in comparable lighting can help you compare changes in your complexion more effectively. If a mark continues to change or stands out because of its shape or colour, seek medical advice.

Can I combine a Korean skincare serum with other products?

Often, yes, but check the ingredients first. A Korean skincare serum containing niacinamide, tranexamic acid or vitamin C will not necessarily work well alongside several other active serums. Keep your routine straightforward, introduce new combinations cautiously and use sun protection during the day.