How much serum should I use at one time?

Start with one or two drops. If you need more, layer another small amount instead of applying a large amount at once.

Where does this serum go in my skincare routine?

Apply it after cleansing and optional toner. Let it absorb or dry, then follow with moisturizer.

Can I use it in both my morning and evening routines?

Yes. It may be used daily, in either your morning or evening routine. During the day, finish with sunscreen rated SPF 30 or higher.

How much niacinamide and Zinc PCA does it contain?

The formula contains 10% niacinamide and 1% Zinc PCA.

Is the serum fragrance-free?

Yes, the 30 ml serum is labeled fragrance-free.

Should I patch test it before regular use?

Yes. Patch test a small amount behind the ear or under the chin 24 hours before regular use. Begin with a small amount, avoid direct eye contact and discontinue use if irritation occurs.

Free US Express shipping from $79

CosDeBaha

N Niacinamide 10% Serum

Q: Which skin types is this serum intended for?

It is intended for all skin types, with particular appeal for oily or blemish-prone skin.

What it is: A clear, watery facial serum with 10% niacinamide and 1% Zinc PCA that supports brighter, more even-looking skin, balanced sebum, hydration and the skin barrier.

Brighter, more even-looking tone
Helps balance excess shine
Clear, watery and quick-absorbing
Hydration and skin-barrier support

Net weight: 30 ml

N Niacinamide 10% Serum

30ml ·$13.99 USD

Brighter, more even-looking tone

Helps balance excess shine

Clear, watery and quick-absorbing

Hydration and skin-barrier support

Main active: No primary active
Intensity: Supportive

PRODUCT DETAILS

This focused daily serum brings together 10% niacinamide and 1% Zinc PCA for skin that looks uneven, dull or shiny. It supports a brighter, more even-looking tone while helping balance excess sebum and the look of blemishes.

There’s care beyond tone and oil, too. The formula provides hydration, a plumper look and skin-barrier support. Sodium hyaluronate contributes hydration support, while dipotassium glycyrrhizate adds soothing and brightening support.

Its clear, watery feel with quick absorption keeps the experience straightforward. It’s intended for all skin types, with particular appeal for oily or blemish-prone skin, and the formula is fragrance-free.

One honest texture note: applying too much may feel sticky. Used with a light hand, this is a simple way to bring tone, oil, hydration and barrier support into your routine.

Learn more

GOES WELL WITH

1025 Dokdo Lotion$14.99 USD

AC Fighting AHA BHA PHA Toner$9.99 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Cream$24.99 USD

5 PDRN B5 Vital Soothing Toner$15.99 USD

2X TGG Care Hyaluronic HydroMask$19.99 USD

5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask$12.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

A focused mix of tone, oil, hydration and skin-barrier support for a more balanced-looking complexion.

Brighter, more even-looking tone
Helps balance oil and blemish appearance
Hydration with a plumper look
Everyday skin-barrier support

Key Ingredients

Niacinamide

Helps visibly brighten uneven tone and support the skin barrier.

A clear glass spoon holding pale powder, surrounded by translucent peach, blush and sage sculptural folds and glossy droplets on ivory.

Zinc PCA

A skin-conditioning zinc salt that supports light hydration while helping oily, blemish-prone skin look less shiny.

Clear hydrogel spheres and droplets on a pale lilac background.

Hyaluronic Acid

Helps hydrate and visibly plump the skin.

A softly folded peach-toned abstract form rests on a warm ivory surface, lit from the upper left with a gentle grounding shadow.

Dipotassium Glycyrrhizate

A defined licorice-related salt used for skin conditioning, with emerging finished-formula evidence for hydration and comfort.

Small clear dropper bottle with a silver-and-black collar and green label centered on a white background.

Concerns & Benefits

Your Concerns

1
Uneven Skin Tone
For skin that looks patchy or less even than you would like.
2
Excess Oil
For excess shine that can leave your complexion looking less balanced.

How To Use

1Before regular use, patch test a small amount behind the ear or under the chin and wait 24 hours.
2After cleansing and optional toner, apply one or two drops over your face, avoiding direct eye contact. If you need more, layer another small amount instead of applying a large amount at once.
3Allow the serum to absorb or dry, then follow with moisturizer.
4Use daily in your morning or evening routine. In the daytime, finish with sunscreen rated SPF 30 or higher.

Frequently asked questions

What is the serum's texture, and does it absorb quickly?

It has a clear, watery texture that absorbs quickly. Applying too much may leave it feeling sticky.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemN Niacinamide 10% Serum$13.99 USD

1025 Dokdo Lotion$14.99 USD

AC Fighting AHA BHA PHA Toner$9.99 USD

Total price: $38.97 USD

This itemN Niacinamide 10% Serum$13.99 USD

1025 Dokdo Lotion$14.99 USD

AC Fighting AHA BHA PHA Toner$9.99 USD

Total price: $38.97 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

TIAM

AC Fighting AHA BHA PHA Toner

Triple-acid exfoliation with moisture support for a clearer, more even-looking tone.

180 ml$9.99 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Cream

A rich, unscented balm moisturizer for lasting hydration and a soft, cushioned feel.

80 ml$24.99 USD

COSRX

5 PDRN B5 Vital Soothing Toner

Lightweight daily hydration for dry, sensitive or dull-looking skin

280 mL$15.99 USD

PO:DL

2X TGG Care Hyaluronic HydroMask

Cooling, close-fitting hydrogel care for thirsty-looking skin and a supple, luminous finish.

42 g each × 4 masks$19.99 USD

COSRX

5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask

Close-fitting hydrogel care for deep hydration, a radiant look and firmer-looking skin.

3 masks, 34 g (1.19 oz.) each$12.99 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD

CosDeBaha Niacinamide 10% Serum for Even Tone | Sleepy Hello

CosDeBaha

N Niacinamide 10% Serum

What it is: A clear, watery facial serum with 10% niacinamide and 1% Zinc PCA that supports brighter, more even-looking skin, balanced sebum, hydration and the skin barrier.

Brighter, more even-looking tone
Helps balance excess shine
Clear, watery and quick-absorbing
Hydration and skin-barrier support

Net weight: 30 ml

N Niacinamide 10% Serum

30ml ·$13.99 USD

Brighter, more even-looking tone

Helps balance excess shine

Clear, watery and quick-absorbing

Hydration and skin-barrier support

Main active: No primary active
Intensity: Supportive

PRODUCT DETAILS

One honest texture note: applying too much may feel sticky. Used with a light hand, this is a simple way to bring tone, oil, hydration and barrier support into your routine.

Learn more

GOES WELL WITH

1025 Dokdo Lotion$14.99 USD

AC Fighting AHA BHA PHA Toner$9.99 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Cream$24.99 USD

5 PDRN B5 Vital Soothing Toner$15.99 USD

2X TGG Care Hyaluronic HydroMask$19.99 USD

5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask$12.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

A focused mix of tone, oil, hydration and skin-barrier support for a more balanced-looking complexion.

Brighter, more even-looking tone
Helps balance oil and blemish appearance
Hydration with a plumper look
Everyday skin-barrier support

Key Ingredients

Concerns & Benefits

Your Concerns

1
Uneven Skin Tone
For skin that looks patchy or less even than you would like.
2
Excess Oil
For excess shine that can leave your complexion looking less balanced.

How To Use

1Before regular use, patch test a small amount behind the ear or under the chin and wait 24 hours.
2After cleansing and optional toner, apply one or two drops over your face, avoiding direct eye contact. If you need more, layer another small amount instead of applying a large amount at once.
3Allow the serum to absorb or dry, then follow with moisturizer.
4Use daily in your morning or evening routine. In the daytime, finish with sunscreen rated SPF 30 or higher.

Frequently asked questions

What is the serum's texture, and does it absorb quickly?

It has a clear, watery texture that absorbs quickly. Applying too much may leave it feeling sticky.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemN Niacinamide 10% Serum$13.99 USD

1025 Dokdo Lotion$14.99 USD

AC Fighting AHA BHA PHA Toner$9.99 USD

Total price: $38.97 USD

This itemN Niacinamide 10% Serum$13.99 USD

1025 Dokdo Lotion$14.99 USD

AC Fighting AHA BHA PHA Toner$9.99 USD

Total price: $38.97 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

TIAM

AC Fighting AHA BHA PHA Toner

Triple-acid exfoliation with moisture support for a clearer, more even-looking tone.

180 ml$9.99 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Cream

A rich, unscented balm moisturizer for lasting hydration and a soft, cushioned feel.

80 ml$24.99 USD

COSRX

5 PDRN B5 Vital Soothing Toner

Lightweight daily hydration for dry, sensitive or dull-looking skin

280 mL$15.99 USD

PO:DL

2X TGG Care Hyaluronic HydroMask

Cooling, close-fitting hydrogel care for thirsty-looking skin and a supple, luminous finish.

42 g each × 4 masks$19.99 USD

COSRX

5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask

Close-fitting hydrogel care for deep hydration, a radiant look and firmer-looking skin.

3 masks, 34 g (1.19 oz.) each$12.99 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD