If you have been searching for the best whitening serum, you are probably looking for a serum that helps your skin look brighter, clearer and more even-toned. In Korean and Japanese skincare, “whitening” is often used to describe brightening care — not bleaching the skin or changing your natural skin colour.
For most skincare shoppers in Australia, the real concern is uneven-looking tone, dullness, post-blemish marks and sun-related discolouration. With strong UV exposure throughout the year, a brightening serum can be a helpful step in your routine, especially when paired with daily sun protection.
At SULSKIN, we focus on Korean and Japanese formulas that feel lightweight, layer well and use well-known brightening ingredients such as niacinamide, tranexamic acid, propolis and antioxidant-rich extracts.
Here is our edited guide to the best brightening serums to try in 2026, including who each one is best suited for.
What Does a Brightening Serum Do?
A brightening serum is designed to help improve the appearance of dullness, uneven-looking tone and visible post-blemish marks. It does not bleach the skin, and it should not be used with the goal of making your skin lighter than its natural tone.
Instead, a good brightening serum helps skin look more balanced, fresh and radiant over time.
Common brightening ingredients include:
- Niacinamide: A popular skincare ingredient that helps support a more even-looking complexion and smoother-looking skin texture.
- Tranexamic Acid: Often used in Korean brightening formulas to help improve the look of uneven tone and visible discolouration.
- Alpha-Arbutin: A brightening ingredient commonly used in products designed for dullness and uneven-looking skin tone.
- Vitamin C Derivatives: Antioxidant ingredients that can help support a brighter-looking complexion.
- Propolis: A nourishing ingredient often used in Korean skincare for a healthy, dewy-looking glow.
- Centella Asiatica: A calming skincare ingredient that helps support skin comfort, especially when using active formulas.
For best results, use one brightening serum consistently and pair it with sunscreen during the day. Brightening care works best when your skin barrier is comfortable and protected.
Our Favourite Brightening Serums Right Now
1. Anua Niacinamide 10% + TXA 4% Serum
Best for: Uneven-looking tone, post-blemish marks and dullness
The Anua Niacinamide 10% + TXA 4% Serum is one of the most popular Korean brightening serums for a reason. It combines 10% niacinamide with 4% tranexamic acid in a lightweight formula that layers easily under moisturiser and sunscreen.
This serum is a great choice if your skin looks dull, uneven or marked after breakouts. The texture is watery and fast-absorbing, making it comfortable for oily, combination and normal skin types.
It also includes soothing ingredients such as centella asiatica, which helps make the formula feel balanced rather than harsh.
Why we like it:
- Lightweight and easy to layer
- Contains niacinamide and tranexamic acid
- Suitable for dullness and uneven-looking skin tone
- Good option for post-blemish mark concerns
- Comfortable for oily and combination skin
How to use: Apply 2–3 drops after cleansing and toning. Follow with moisturiser. In the morning, finish with sunscreen.
2. Some By Mi Niacinamide 30 Days Miracle Serum
Best for: Beginners who want a gentle brightening serum
The Some By Mi Niacinamide 30 Days Miracle Serum is a good option if you are starting a brightening routine and want something easy to use. It is designed to help skin look clearer, smoother and more refreshed with consistent use.
Compared with some stronger active serums, this formula has a softer, more hydrating feel. It sits well under moisturiser and does not feel heavy, which makes it suitable for everyday routines.
This is a nice choice for customers who want a brightening serum that also feels comfortable on dry-combination or normal skin.
Why we like it:
- Beginner-friendly brightening option
- Helps improve the look of dullness
- Comfortable, hydrating texture
- Good for daily skincare routines
- Layers well under moisturiser
How to use: Use after toner and before moisturiser. Start a few times a week, then increase depending on how your skin feels.
3. Beauty of Joseon Glow Serum: Propolis + Niacinamide
Best for: A healthy-looking glow and sensitive skin routines
Beauty of Joseon Glow Serum: Propolis + Niacinamide is a gentle Korean serum that focuses on glow, nourishment and a more radiant-looking complexion.
It combines propolis extract with niacinamide in a honey-like gel texture that feels soft and comforting on the skin. This is not the strongest brightening serum in the list, but it is one of the easiest to use daily.
If your skin does not enjoy high-percentage active serums, this is a beautiful option. It gives skin a fresh, dewy look without feeling sticky or heavy.
Why we like it:
- Gentle everyday glow serum
- Contains propolis and niacinamide
- Comfortable for sensitive or dry skin routines
- Leaves skin looking healthy and radiant
- Great under moisturiser or makeup
How to use: Apply 2–3 drops after toner. Follow with moisturiser. Can be used morning or night.
4. Medicube Zero Pore Serum
Best for: Uneven-looking texture and visible pores
Medicube Zero Pore Serum is not only a brightening serum, but it can be a useful option if your skin concerns include visible pores, rough-looking texture and uneven-looking tone.
The formula includes niacinamide, along with ingredients that support smoother-looking skin. It is a good choice for customers who want one serum that feels practical and easy to add to a daily routine.
If your skin feels easily overwhelmed by too many products, this can be a simple way to target the look of pores and general skin clarity at the same time.
Why we like it:
- Good for visible pores and uneven-looking texture
- Contains niacinamide
- Lightweight and easy to layer
- Suitable for simple skincare routines
- Nice option for combination skin
How to use: Apply after toner and before moisturiser. Use sunscreen during the day to help maintain your results.
How to Choose the Right Brightening Serum
Choose Anua Niacinamide 10% + TXA 4% Serum if you want a lightweight serum for uneven-looking tone, dullness and post-blemish marks.
Choose Some By Mi Niacinamide 30 Days Miracle Serum if you are new to brightening serums and want something easy to use.
Choose COSRX The Niacinamide 15 Serum if your skin is already used to niacinamide and you want a stronger active step.
Choose Beauty of Joseon Glow Serum if you want a gentle glow serum that feels nourishing and comfortable.
Choose Medicube Zero Pore Serum if you want to improve the look of pores, texture and overall skin clarity in one step.
How to Use a Brightening Serum in Your Routine
A brightening serum should usually be applied after cleansing and toning, before moisturiser.
Morning routine:
- Cleanser
- Toner
- Brightening serum
- Moisturiser
- Sunscreen
Night routine:
- Cleanser
- Toner
- Brightening serum
- Moisturiser
You do not need to use several brightening serums at the same time. In fact, using too many active products together can make skin feel uncomfortable. Start with one serum and give it time.
For most people, visible improvement in the look of dullness or uneven tone takes consistent use over several weeks. Newer post-blemish marks may appear to soften sooner, while more stubborn discolouration can take longer.
The most important step during the day is sunscreen. Without daily sun protection, uneven-looking tone can become more noticeable again, especially in Australian conditions.
FAQ
What is the difference between whitening and brightening serum?
In Korean and Japanese skincare, “whitening” is often used to describe products that help skin look brighter and more even-toned. It does not mean bleaching your skin or changing your natural skin colour. For the Australian market, “brightening serum” is usually the clearer and more accurate term.
Can brightening serums remove dark spots?
Brightening serums can help improve the appearance of visible dark spots, post-blemish marks and uneven-looking tone over time. Results vary depending on the product, your skin type, your routine and how consistently you use sunscreen.
How long does a brightening serum take to work?
Most people should allow at least 4–8 weeks of consistent use to notice visible changes in the look of dullness or uneven tone. Some surface dullness may look better sooner, but deeper-looking discolouration usually takes longer.
Can I use a brightening serum every day?
Many brightening serums can be used daily, but it depends on your skin tolerance and the formula. If you are new to active skincare, start 2–4 times a week and increase gradually.
Can I use niacinamide and tranexamic acid together?
Yes, many Korean skincare formulas combine niacinamide and tranexamic acid in one product. If you are using separate products, introduce them slowly and avoid layering too many active serums at once.
Are brightening serums suitable for sensitive skin?
Some are, but choose carefully. Gentle options such as Beauty of Joseon Glow Serum may be more suitable for sensitive routines. If your skin is easily irritated, avoid starting with high-percentage active serums.
Do I need sunscreen with a brightening serum?
Yes. Sunscreen is very important, especially in Australia. Brightening products work best when your skin is protected from daily UV exposure.
Final Thoughts
The best brightening serum is the one that suits your skin type, your routine and your level of experience with active ingredients.
For a lightweight brightening serum, Anua Niacinamide 10% + TXA 4% Serum is a strong choice. For beginners, Some By Mi is an easy place to start. For glow and comfort, Beauty of Joseon is a beautiful daily option. For more experienced users, COSRX The Niacinamide 15 Serum offers a higher-niacinamide formula. For texture and pore concerns, Medicube Zero Pore Serum is a practical multi-benefit pick.
Explore our brightening skincare range at SULSKIN and choose the formula that best fits your skin goals.
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