COSRX The 6 Peptide Skin Booster Serum shown with text highlighting ‘First Step Booster’, clinically proven and non-comedogenic; clinically proven Korean peptide serum that boosts glow, firmness, and clarity for sensitive skin as the first step of skincare routine.
COSRX The 6 Peptide Skin Booster Serum clinical results after 4 weeks shown on pink background; 100% users reported softer, smoother, and healthier skin; peptide-rich first-step serum enhancing firmness, glow, and hydration for sensitive skin.
Clinically proven COSRX The 6 Peptide Skin Booster Serum performance chart showing +162.5% hydration, +76.42% texture, and +37.9% brightness improvement; K-beauty all-in-one serum tested for firmness, glow, and radiance under dermatological supervision.
Before-and-after clinical visuals showing 76.41% smoother skin texture and 22.22% increased density after 4 weeks of using COSRX The 6 Peptide Skin Booster Serum; peptide-enriched formula for firm, glowing, and resilient skin barrier.
COSRX The 6 Peptide Skin Booster Serum hydration and brightness results with before-and-after images; +162.5% hydration, +37.9% brightening, +40.1% clarity; first-step Korean serum clinically tested to restore glow and firmness in sensitive skin.
Clinical before-and-after images showing reduction in blackheads, whiteheads, and pigmentation after 4 weeks of COSRX The 6 Peptide Skin Booster Serum use; peptide and NAG formula improving sebum balance, clarity, and even tone.
COSRX The 6 Peptide Skin Booster Serum ingredients visual highlighting six peptide complexes, collagen-boosting, retexturizing, brightening, soothing, firming, and pore care; multifunctional Korean serum for smooth, glowing, and firm skin.
Ingredient synergy chart for COSRX The 6 Peptide Skin Booster Serum showing Niacinamide, N-Acetyl Glucosamine, Adenosine, and Hyaluronic Acid; scientifically formulated to improve elasticity, skin barrier, and hydration for all skin types.
COSRX The 6 Peptide Skin Booster Serum clinical report image showing non-comedogenic certification from Dermacosmetic Skin Science Laboratory Co., Ltd; proven suitable for acne-prone and sensitive skin without clogging pores.
Clinical report verifying COSRX The 6 Peptide Skin Booster Serum as suitable for sensitive skin; tested by Dermacosmetic Skin Science Laboratory Co., Ltd, June 2023; peptide formula proven non-irritating, safe as a first-step serum for firm, glowing, and balanced skin.
Illustrated skincare routine showing COSRX The 6 Peptide Skin Booster Serum as the second step after cleansing; Korean all-in-one peptide booster formulated with hyaluronic acid and amino acids to prep, firm, and awaken skin for glow and hydration.
Texture swatches of COSRX The 6 Peptide Skin Booster Serum showing lightweight, layerable formula that pairs with any active ingredient; designed to soothe irritation and enhance serum efficacy for sensitive skin barrier repair and glow.
15% off
COSRX The 6 Peptide Skin Booster Serum shown with text highlighting ‘First Step Booster’, clinically proven and non-comedogenic; clinically proven Korean peptide serum that boosts glow, firmness, and clarity for sensitive skin as the first step of skincare routine.
COSRX The 6 Peptide Skin Booster Serum clinical results after 4 weeks shown on pink background; 100% users reported softer, smoother, and healthier skin; peptide-rich first-step serum enhancing firmness, glow, and hydration for sensitive skin.
Clinically proven COSRX The 6 Peptide Skin Booster Serum performance chart showing +162.5% hydration, +76.42% texture, and +37.9% brightness improvement; K-beauty all-in-one serum tested for firmness, glow, and radiance under dermatological supervision.
Before-and-after clinical visuals showing 76.41% smoother skin texture and 22.22% increased density after 4 weeks of using COSRX The 6 Peptide Skin Booster Serum; peptide-enriched formula for firm, glowing, and resilient skin barrier.
COSRX The 6 Peptide Skin Booster Serum hydration and brightness results with before-and-after images; +162.5% hydration, +37.9% brightening, +40.1% clarity; first-step Korean serum clinically tested to restore glow and firmness in sensitive skin.
Clinical before-and-after images showing reduction in blackheads, whiteheads, and pigmentation after 4 weeks of COSRX The 6 Peptide Skin Booster Serum use; peptide and NAG formula improving sebum balance, clarity, and even tone.
COSRX animation explaining how the 6 Peptide Skin Booster Serum addresses collagen loss by targeting pores, dryness, dark spots, redness, uneven texture, and wrinkles. Hydration droplets absorb into skin as six peptides boost firmness, glow, and smoothness while supporting natural collagen and soothing sensitive skin.
COSRX The 6 Peptide Skin Booster Serum ingredients visual highlighting six peptide complexes, collagen-boosting, retexturizing, brightening, soothing, firming, and pore care; multifunctional Korean serum for smooth, glowing, and firm skin.
Ingredient synergy chart for COSRX The 6 Peptide Skin Booster Serum showing Niacinamide, N-Acetyl Glucosamine, Adenosine, and Hyaluronic Acid; scientifically formulated to improve elasticity, skin barrier, and hydration for all skin types.
COSRX The 6 Peptide Skin Booster Serum clinical report image showing non-comedogenic certification from Dermacosmetic Skin Science Laboratory Co., Ltd; proven suitable for acne-prone and sensitive skin without clogging pores.
Clinical report verifying COSRX The 6 Peptide Skin Booster Serum as suitable for sensitive skin; tested by Dermacosmetic Skin Science Laboratory Co., Ltd, June 2023; peptide formula proven non-irritating, safe as a first-step serum for firm, glowing, and balanced skin.
Illustrated skincare routine showing COSRX The 6 Peptide Skin Booster Serum as the second step after cleansing; Korean all-in-one peptide booster formulated with hyaluronic acid and amino acids to prep, firm, and awaken skin for glow and hydration.
Video showing the lightweight texture of COSRX’s 6 Peptide Skin Booster Serum absorbing quickly into the skin. The water-based formula leaves a smooth, hydrated surface, highlighting its gentle first-step suitability for sensitive skin and its role in boosting glow, firmness, and overall skin texture.
Texture swatches of COSRX The 6 Peptide Skin Booster Serum showing lightweight, layerable formula that pairs with any active ingredient; designed to soothe irritation and enhance serum efficacy for sensitive skin barrier repair and glow.
Video of a creator playfully tossing a pink prop while promoting COSRX’s 6 Peptide Skin Booster Serum. The playful motion and pastel visuals highlight the booster as a fun, easy first-step serum that enhances glow, firmness, hydration, and supports sensitive skin in a lightweight routine.

Brightening Boost

Unlock Your Brightest Glow

The Brightening Boost is your intensive, expert-engineered kit to achieve a visibly brightened, glowing, and smooth complexion. This powerful bundle pairs two best-selling formulas for maximum brightening impact with zero irritation.

Size
$42.50 $50.00
Minus Plus
Shop easier with Apple Pay Klarna Google Pay

Recommended for
COSRX The 6 Petide Skin Booster is suitable for all skin types and can be used all day and in any season. It is especially ideal for those seeking a lightweight, non-sticky serum to enhance their original skincare routine. Additionally, it is perfect for individuals with complex skin concerns, including those who want to address multiple skin issues like pores, excess sebum, fine lines, and uneven skin texture and tone.


Target concerns 
- Dullness 
- Oily skin 
- Dehydration 
- Pores
- Anti-aging 
- Redness & Sensitive skin


Texture
Light-weight and non-sticky like toner and easy to pair other active ingredients and textures.

After cleansing you may use this serum as the first step of skin care. Spread the serum on the entire face and you may apply several times to amplify the effect of the next serum or ampoule.

KEY INGREDIENTS


6 Peptides : Restores multiple skin concerns
•  SH-Polypeptide-121: Collagen Boosting & Plumping 
•  Copper Tripeptide-1: Retexturize 
•  Dipeptide Diaminobutyroyl Benzylamide Diacetate: Excess Sebum & Pore Care
• Oligopeptide-68: Brightening 
•  Palmitoyl Tripeptide-8: Soothe & Reduce Skin Sensitivity
•  Acetyl Hexapeptide-8: Smooth Fine Lines & Firmness 

×

Full Ingredients

Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, Betaine, t-Butyl Alcohol, Sodium PCA, Sodium Lactate, Acetyl Hexapeptide-8, Copper Tripeptide-1, PCA, sh-Polypeptide-121, Serine, Alanine, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Glycine, Glutamic Acid, Lysine HCl, Threonine, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Arginine, Tocopherol, Oligopeptide-68, Proline, Dextran, Palmitoyl Tripeptide-8, Glycine Soja (Soybean) Oil, Hydrogenated Lecithin, Potassium Sorbate, Sodium Oleate
DETAILS
HOW TO USE
INGREDIENTS

Recommended for
COSRX The 6 Petide Skin Booster is suitable for all skin types and can be used all day and in any season. It is especially ideal for those seeking a lightweight, non-sticky serum to enhance their original skincare routine. Additionally, it is perfect for individuals with complex skin concerns, including those who want to address multiple skin issues like pores, excess sebum, fine lines, and uneven skin texture and tone.


Target concerns 
- Dullness 
- Oily skin 
- Dehydration 
- Pores
- Anti-aging 
- Redness & Sensitive skin


Texture
Light-weight and non-sticky like toner and easy to pair other active ingredients and textures.

After cleansing you may use this serum as the first step of skin care. Spread the serum on the entire face and you may apply several times to amplify the effect of the next serum or ampoule.

KEY INGREDIENTS


6 Peptides : Restores multiple skin concerns
•  SH-Polypeptide-121: Collagen Boosting & Plumping 
•  Copper Tripeptide-1: Retexturize 
•  Dipeptide Diaminobutyroyl Benzylamide Diacetate: Excess Sebum & Pore Care
• Oligopeptide-68: Brightening 
•  Palmitoyl Tripeptide-8: Soothe & Reduce Skin Sensitivity
•  Acetyl Hexapeptide-8: Smooth Fine Lines & Firmness 

×

Full Ingredients

Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, Betaine, t-Butyl Alcohol, Sodium PCA, Sodium Lactate, Acetyl Hexapeptide-8, Copper Tripeptide-1, PCA, sh-Polypeptide-121, Serine, Alanine, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Glycine, Glutamic Acid, Lysine HCl, Threonine, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Arginine, Tocopherol, Oligopeptide-68, Proline, Dextran, Palmitoyl Tripeptide-8, Glycine Soja (Soybean) Oil, Hydrogenated Lecithin, Potassium Sorbate, Sodium Oleate
🤖 Still not sure? Ask our AI Shopping Consultant.
More details Right

What's inside this set

Everyday skincare essentials for you & your loved ones
COSRX The 6 Peptide Skin Booster Serum bottle on white background, featuring minimalist design and labeled ingredients Hyaluronic Acid, NAG, and Amino Acids; Korean all-in-one first-step serum formulated to improve firmness, glow, and skin texture for sensitive skin.
Selling Fast

The 6 Peptide Skin Booster Serum

Multi-Concern All-in One Peptide Booster This lightweight, toner-like serum blends six powe...
View details
COSRX Advanced The Vitamin C 23 Serum bottle featuring Super Vitamin E and Hyaluronic Acid; high-potency 23% stabilized Vitamin C formulation designed to brighten dull skin, refine pores, and even skin tone while hydrating; minimal modern K-beauty packaging emphasizing clinical-grade clarity and gentle brightening care.
Renewal

Advanced The Vitamin C 23 Serum

Power-Brightening Pure Vitamin C Serum COSRX’s Advanced The Vitamin C 23 Serum features a hi...
View details

Overall rating: 5.0 / 5 from 3 reviews.

AI Generated Review Summary

Summary topics

Review topics: [].

Review highlights

Reviews

Only started to use few

"Only started to use few days ago, so I can't tell if they are effective. But I like the texture of the products."

— Eri P. (5/5)

​"I love the application and

"​"I love the application and how it melts into my skin. I'll need more time to see the full results, but I'm impressed. ""

— Na K. (5/5)

I love the peptide, been

"I love the peptide, been using it for over a month. My skin is smoother and a little lifted. I've been using the vitamin C for a little almost 2wks and can see a different inthe brightness. I would definitely recommend these products."

— Colleen M. (5/5)

Q&A