What does the serum feel like?

It has a lightweight serum texture.

What form and concentration of vitamin C does it contain?

It contains 23% ascorbic acid, or pure vitamin C.

Which supporting ingredients are highlighted alongside vitamin C?

Tocopherol, or vitamin E, supports the serum's antioxidant pairing with vitamin C. Panthenol adds moisturizing, soothing and skin-barrier support.

How do I install the separate dropper?

Remove the bottle cap, place the dropper inside and twist it until it locks.

How much serum should I use, and how should I apply it?

Place two to three drops in your palm, apply the serum to your skin and gently pat to help it absorb.

What should I apply after the serum during the day?

Follow the serum with sunscreen when you use it during the day.

Free standard shipping to eligible countries from €71

ISNTREE

Hyper Vitamin C 23 Serum

What it is: A lightweight facial serum with 23% ascorbic acid that helps brighten dull-looking skin and make uneven tone look more even.

23% pure vitamin C
Brighter, more even-looking tone
Lightweight serum feel
Panthenol moisture support

Net weight: 20 ml

Hyper Vitamin C 23 Serum

20ml ·€11.00

23% pure vitamin C

Brighter, more even-looking tone

Lightweight serum feel

Panthenol moisture support

Main active: Vitamin C
Intensity: Advanced

PRODUCT DETAILS

Hello, brighter-looking skin. This lightweight serum is made for dull-looking complexions and routines focused on visible dark spots or uneven-looking tone. Its 23% ascorbic acid, or pure vitamin C, gives the formula a clear purpose: helping brighten the complexion and leave tone looking more even.

The feel stays simple with a lightweight serum texture. Tocopherol, also known as vitamin E, is highlighted for antioxidant support alongside vitamin C. Panthenol adds moisturizing, soothing and skin-barrier support, giving the brightening formula a supportive care note.

If dullness, dark spots or uneven-looking tone are guiding your routine, this serum keeps those goals front and center. You get focused vitamin C care with a light feel, plus panthenol support for moisture and comfort. It is a straightforward way to bring a brightening step into your routine.

Learn more

GOES WELL WITH

1025 Dokdo Eye Cream€20.88

1025 Dokdo Sleeping Pack€14.98

1025 Dokdo Sun Cream€17.98

100 Reedle Shot Stick Pouch€7.88

1025 Dokdo Cleanser€10.99

1025 Dokdo Cream€23.00

1025 Dokdo Lotion€13.98

1025 Dokdo Pad€18.99

Brightening and tone care with a lightweight feel, plus moisturizing, soothing and skin-barrier support from panthenol.

Brighter-looking complexion
More even-looking tone
Moisture and comfort support

Key Ingredients

Seven dry amber, apricot, lavender and celadon relief rays spread diagonally across one warm-ivory matte plaster surface beside a tiny coral point.

Vitamin C

An antioxidant ingredient family that can help brighten uneven-looking tone and soften visible dullness.

A translucent amber membrane curves across a low coral frame, casting a golden shadow on a pale blush surface, with a lavender tile behind.

Vitamin E

A Vitamin E family used for formula antioxidant support or conditioning—with evidence that depends on the exact form.

Panthenol

Pro-vitamin B5 that helps skin hold moisture and feel softer and more comfortable.

Dark dropper bottle centered on a vivid orange background with a hard shadow.

Concerns & Benefits

Your Concerns

1
Dullness
Your complexion looks dull, and brighter-looking care is the focus.
2
Uneven Skin Tone
Uneven-looking tone or the appearance of dark spots is guiding your routine.
3

How To Use

1Remove the bottle cap, place the dropper inside and twist it until it locks.
2Place two to three drops in your palm, apply the serum to your skin and gently pat to help it absorb.
3When using the serum during the day, follow with sunscreen.

Dropper bottle displayed among clear laboratory beakers on a reflective white surface.

Frequently asked questions

What concerns is this serum designed to address?

It is designed for dull-looking complexions and routines focused on dark spots or uneven-looking tone. It helps brighten the complexion and make tone look more even.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemHyper Vitamin C 23 Serum€11.00

1025 Dokdo Eye Cream€20.88

1025 Dokdo Sleeping Pack€14.98

Total price: €46.86

This itemHyper Vitamin C 23 Serum€11.00

1025 Dokdo Eye Cream€20.88

1025 Dokdo Sleeping Pack€14.98

Total price: €46.86

ROUND LAB

1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz€20.88

ROUND LAB

1025 Dokdo Sleeping Pack

A lightweight, unscented overnight gel for hydration and smoother-feeling skin.

100 ml€14.98

ROUND LAB

1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml€17.98

VT COSMETICS

100 Reedle Shot Stick Pouch

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

2 mL × 10€7.88

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml€10.99

ROUND LAB

1025 Dokdo Cream

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

80 ml€23.00

ROUND LAB

1025 Dokdo Lotion

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

200 ml€13.98

ROUND LAB

1025 Dokdo Pad

Two-sided toner care for tidier texture and balanced moisture.

70 pads / 120 g€18.99

ISNTREE Hyper Vitamin C 23 Serum | Sleepy Hello

ISNTREE

Hyper Vitamin C 23 Serum

What it is: A lightweight facial serum with 23% ascorbic acid that helps brighten dull-looking skin and make uneven tone look more even.

23% pure vitamin C
Brighter, more even-looking tone
Lightweight serum feel
Panthenol moisture support

Net weight: 20 ml

Hyper Vitamin C 23 Serum

20ml ·€11.00

23% pure vitamin C

Brighter, more even-looking tone

Lightweight serum feel

Panthenol moisture support

Main active: Vitamin C
Intensity: Advanced

PRODUCT DETAILS

Learn more

GOES WELL WITH

1025 Dokdo Eye Cream€20.88

1025 Dokdo Sleeping Pack€14.98

1025 Dokdo Sun Cream€17.98

100 Reedle Shot Stick Pouch€7.88

1025 Dokdo Cleanser€10.99

1025 Dokdo Cream€23.00

1025 Dokdo Lotion€13.98

1025 Dokdo Pad€18.99

Brightening and tone care with a lightweight feel, plus moisturizing, soothing and skin-barrier support from panthenol.

Brighter-looking complexion
More even-looking tone
Moisture and comfort support