What is the texture, and does it absorb quickly?

The serum has a clear, watery texture and absorbs quickly.

Which skin types is it intended for?

It is intended for all skin types, including normal, dry, oily, combination and sensitive skin.

Where does it go in my routine?

Apply it after cleansing and toning, then follow with moisturizer. In the morning, finish with sunscreen.

How much should I use, and where can I apply it?

Apply a few drops around the eye area or over your entire face.

How often can I use it?

It can be used daily in both your morning and evening routines.

How much caffeine and niacinamide does it contain?

The formula contains 10% caffeine and 10% niacinamide.

Should I test it before normal use?

Yes. Because this is a concentrated serum, test a small amount under your chin or on your neck first, then proceed only if your skin is compatible.

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CosDeBaha

CN Serum

What it is: A clear, watery face serum that helps refresh the look of puffiness and dark circles while supporting more even-looking tone, smoother texture and hydration.

Refreshed-Looking Eye Area
Brighter, More Even-Looking Tone
Hydrating Hyaluronic Acid
Clear, Watery and Quick-Absorbing

Net weight: 30 ml

CN Serum

30ml ·$16.99 USD

Refreshed-Looking Eye Area

Brighter, More Even-Looking Tone

Hydrating Hyaluronic Acid

Clear, Watery and Quick-Absorbing

Main active: No primary active
Intensity: Supportive

PRODUCT DETAILS

CN Serum pairs 10% caffeine with 10% niacinamide in a clear, watery formula for the face, neck and eye area.

Around the eyes, caffeine helps soften the look of puffiness and dark circles for a more refreshed appearance. You can also use the serum across your face when those concerns sit alongside uneven tone or texture.

Niacinamide supports brighter, more even-looking tone while helping improve uneven texture and the appearance of pores. It also supports the skin barrier and helps control sebum, bringing several everyday complexion goals into one focused serum.

Sodium Hyaluronate and Hydrolyzed Hyaluronic Acid add hydration support and help improve skin elasticity. The result is a versatile serum with a clear, watery texture that absorbs quickly, designed for all skin types and suitable for both morning and evening routines.

Learn more

GOES WELL WITH

Black Tea Mask Pack$22.00 USD

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Lotion$14.99 USD

Brightamin Brightening Eye Serum Stick$35.99 USD

Centella Phyto & 5 Peptide Concentrate Cream$13.99 USD

Centella Phyto & 5 Peptide Concentrate Cream$25.99 USD

Centella Phyto & 5 Peptide Concentrate Cream$9.99 USD

A focused blend for refreshed-looking eyes, more even tone, smoother-looking texture, hydration and skin-barrier support.

A More Refreshed Eye Look
Brighter, More Even-Looking Tone
Smoother-Looking Texture
Hydration Support
Barrier and Oil-Balance Support

Key Ingredients

Caffeine

Studied for the look of puffiness and dark circles—with formula-specific results.

Niacinamide

Helps visibly brighten uneven tone and support the skin barrier.

Clear hydrogel spheres and droplets on a pale lilac background.

Hyaluronic Acid

Helps hydrate and visibly plump the skin.

Three oversized translucent, softly faceted glass crystals arranged on a pale lavender stage above a blush background with a small coral accent.

Allantoin

Helps soothe and soften dry, rough-feeling skin.

Amber glass serum bottle with a dropper and blue-gray front label.

Concerns & Benefits

Your Concerns

1
Puffiness
For an eye area that can look puffy or less refreshed.
2
Uneven Skin Tone
For a complexion that can look uneven or dull.
3

How To Use

1After cleansing and toning, apply a few drops around the eye area or over your face and neck.
2Gently pat the serum until it is fully absorbed.
3Follow with moisturizer and, in the morning, finish with sunscreen.
4Use daily in both your morning and evening routines.

Amber glass dropper bottle with a black bulb, gold collar and blue-gray label on a white background.

Frequently asked questions

What skin concerns is this serum designed to address?

It helps reduce the appearance of puffiness and dark circles, improve uneven-looking tone and texture, refine the look of pores and support hydration.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemCN Serum$16.99 USD

Black Tea Mask Pack$22.00 USD

100 Reedle Shot Stick Pouch$8.09 USD

Total price: $47.08 USD

This itemCN Serum$16.99 USD

Black Tea Mask Pack$22.00 USD

100 Reedle Shot Stick Pouch$8.09 USD

Total price: $47.08 USD

HEIMISH

Black Tea Mask Pack

A creamy cooling wash-off mask for hydration, calming care and visibly refined pores.

110 ml (3.71 fl oz)$22.00 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

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 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

Dr. Jart+

Brightamin Brightening Eye Serum Stick

A lightweight balm stick that brightens and hydrates the eye area.

3.6 g$35.99 USD

HARUHARU WONDER

Centella Phyto & 5 Peptide Concentrate Cream

All-day moisture with a soft, bouncy finish and five-peptide support for firmer, smoother-looking skin.

30 ml$13.99 USD

HARUHARU WONDER

Centella Phyto & 5 Peptide Concentrate Cream

All-day moisture and firmer-looking care in a soft, bouncy cream, with a refill for the original container.

30 ml + 30 ml refill$25.99 USD

HARUHARU WONDER

Centella Phyto & 5 Peptide Concentrate Cream

Light, refillable cream for moisture, bounce and smoother-looking firmness.

Multiple optionsFrom$9.99 USD

Choose options

CosDeBaha CN Caffeine + Niacinamide Serum 30 ml

CosDeBaha

CN Serum

What it is: A clear, watery face serum that helps refresh the look of puffiness and dark circles while supporting more even-looking tone, smoother texture and hydration.

Refreshed-Looking Eye Area
Brighter, More Even-Looking Tone
Hydrating Hyaluronic Acid
Clear, Watery and Quick-Absorbing

Net weight: 30 ml

CN Serum

30ml ·$16.99 USD

Refreshed-Looking Eye Area

Brighter, More Even-Looking Tone

Hydrating Hyaluronic Acid

Clear, Watery and Quick-Absorbing

Main active: No primary active
Intensity: Supportive

PRODUCT DETAILS

CN Serum pairs 10% caffeine with 10% niacinamide in a clear, watery formula for the face, neck and eye area.

Learn more

GOES WELL WITH

Black Tea Mask Pack$22.00 USD

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Lotion$14.99 USD

Brightamin Brightening Eye Serum Stick$35.99 USD

Centella Phyto & 5 Peptide Concentrate Cream$13.99 USD

Centella Phyto & 5 Peptide Concentrate Cream$25.99 USD

Centella Phyto & 5 Peptide Concentrate Cream$9.99 USD

A focused blend for refreshed-looking eyes, more even tone, smoother-looking texture, hydration and skin-barrier support.

A More Refreshed Eye Look
Brighter, More Even-Looking Tone
Smoother-Looking Texture
Hydration Support
Barrier and Oil-Balance Support