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COSRX

COSRX Refresh AHA/BHA Vitamin C Booster Serum 30ml

$20.32
Visibly brightens skin tone and fades uneven patches Delivers deep, lasting hydration that keeps skin plump throughout the day Gently dissolves dead surface cells for renewed radiance Refreshes and revives tired, stressed skin
Refreshing Daily Skin Boosting Serum Daily peeling serum extracted from juicy Kiwi and Dragon Fruit Skin to care for dead skin cells and enhance the overall skin tone. Watery and Absorbant Texture Hydrating and soft serum instantly absorbs with a light finish, suitable for combination to oily skin...
For oily skin dealing with excess oil: COSRX's serum with Niacinamide works from within to deliver visibly brightens skin tone and fades uneven patches, not just temporary comfort.
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Korean Beauty Formulation Suitable for Daily Use
Niacinamide 2% Vitamin C
COSRX Refresh AHA/BHA Vitamin C Booster Serum 30ml
COSRX Refresh AHA/BHA Vitamin C Booster Serum 30ml Default Title
$20.32
Clinically proven actives Dermatologist tested 100% authentic Korean Cruelty-free
What's inside ·

Niacinamide 2%, the repair molecule

Niacinamide works at the junction between melanocytes and keratinocytes, intercepting melanin transfer before pigment reaches the visible surface. It simultaneously boosts ceramide synthesis to strengthen the lipid barrier, which is why consistent use addresses both discoloration and dehydration. In this serum, Niacinamide targets excess oil, delivering visibly brightens skin tone and fades uneven patches with consistent use.
Niacinamide 2%
intercepts melanin transfer to fade spots and refine pore texture from within
Vitamin C
neutralizes free radicals and inhibits melanin production for brighter, more protected skin
The texture

Lightweight, absorbing serum

  • Refreshing Daily Skin Boosting Serum
  • Daily peeling serum extracted from juicy Kiwi and Dragon Fruit Skin to care for dead skin cells and enhance the overall skin tone.
  • Watery and Absorbant Texture
  • Hydrating and soft serum instantly absorbs with a light finish, suitable for combination to oily skin as well.
  • Revitalize!
  • 2% Niacinamide and AHA/BHA exfoliates to brighten your skin full of fruity energy.
Oily Skin Excess Oil
Hover the swatch — it ripples like water

How to use

1

After cleansing and toning, apply a small amount to the face.

2

Avoid the immediate eye area.

3

Follow with moisturizer.

4

Start a few times weekly and increase as tolerated.

5

Use sunscreen during daytime use.

Full transparency

Ingredients

Niacinamide intercepts melanin transfer to fade spots and refine pore texture from within, while Vitamin C neutralizes free radicals and inhibits melanin production for brighter, more protected skin, creating a formula that addresses multiple needs at once.

Niacinamide works at the junction between melanocytes and keratinocytes, intercepting melanin transfer before pigment reaches the visible surface. It simultaneously boosts ceramide synthesis to strengthen the lipid barrier, which is why consistent use addresses both discoloration and dehydration. At concentrations above 4%, it also regulates sebum output without stripping, making it one of the few actives that benefits every skin type.

The detail

Specs & details

FormatLightweight serum
SizeDefault Title
Skin typesOily Skin
Country of originSouth Korea
Pairs beautifully with

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$20.32
Before you add to cart

Questions & answers

After cleansing and toning, before moisturizer. Serums deliver actives most effectively on freshly prepped skin.
Yes. Apply from thinnest to thickest consistency and allow each layer to absorb before the next.
Most users notice initial improvement within 2 to 4 weeks. For full benefits like visibly brightens skin tone and fades uneven patches, allow 6 to 8 weeks of consistent use.
Your skin begins adjusting. You may notice improved hydration and comfort before more visible changes like texture refinement become apparent.
Yes, this formula is developed to be compatible with oily skin dealing with excess oil. If you have very reactive skin, patch test on the inner arm before full application.
The formula is designed to be well-tolerated. For pregnancy-specific concerns, consult your healthcare provider. For sensitive skin, patch test before full application.
Niacinamide intercepts melanin transfer to fade spots and refine pore texture from within. Consistent daily use is key to seeing the full benefits.
Check the INCI list for the most accurate information on fragrance components. The formula is developed for minimal irritation potential.
Store in a cool, dry place away from direct sunlight. Use within 12 months of opening for optimal freshness and efficacy.
Serums have a higher concentration of targeted actives than essences and a lighter consistency than most ampoules. They deliver the most potent treatment in your routine.
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About the brand

OriginSeoul, KR
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