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COSRX

COSRX The 6 Peptide Skin Booster Serum 150ml

$17.94
Delivers concentrated actives deep into the skin Targets specific concerns with a lightweight, fast-absorbing formula Helps improve skin texture and tone with consistent use
6 potent peptide that enhances overall skin condition as your first step serum *Dermatologist tested *Sensitive skin irritation tested 
For sensitive skin dealing with sensitivity and redness: COSRX's serum with Peptides works from within to deliver delivers concentrated actives deep into the skin, not just temporary comfort.
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Dermatologist Tested
Peptides
COSRX The 6 Peptide Skin Booster Serum 150ml
COSRX The 6 Peptide Skin Booster Serum 150ml Default Title
$17.94
Clinically proven actives Dermatologist tested 100% authentic Korean Cruelty-free
What's inside ·

Peptides, the repair molecule

Peptides are short chains of amino acids that act as chemical messengers inside the skin. When applied topically, they mimic the signals that trigger collagen synthesis, essentially nudging the skin into repair mode. In this serum, Peptides targets sensitivity and redness, delivering delivers concentrated actives deep into the skin with consistent use.
Peptides
signal the skin to produce more collagen through its own natural repair pathways
The texture

Lightweight, absorbing serum

6 potent peptide that enhances overall skin condition as your first step serum 

*Dermatologist tested 
*Sensitive skin irritation tested 

Sensitive Skin Sensitivity and Redness
Hover the swatch — it ripples like water

How to use

1

After cleansing, apply as your first serum step.

2

Spread evenly over the face and neck.

3

Pat gently until absorbed.

4

Follow with moisturizer or additional treatment products.

5

Use morning and night.

Full transparency

Ingredients

Peptides signal the skin to produce more collagen through its own natural repair pathways. This focused formula puts all its power behind one proven active for maximum impact.

Peptides are short chains of amino acids that act as chemical messengers inside the skin. When applied topically, they mimic the signals that trigger collagen synthesis, essentially nudging the skin into repair mode. Unlike retinol, which forces cellular turnover (and can irritate), peptides work through the skin's own natural pathways, making them particularly effective for daily use without downtime or sensitivity.

The detail

Specs & details

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

Complete the routine

Build your routine Tick products to add them with this one
$17.94
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 delivers concentrated actives deep into the skin, 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 sensitive skin dealing with sensitivity and redness. 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.
Peptides signal the skin to produce more collagen through its own natural repair pathways. 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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