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.
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.
Model holding COSRX The 6 Peptide Skin Booster Serum alongside Advanced Snail products; visual promoting peptide and snail synergy to enhance elasticity, glow, and barrier strength in sensitive skin.
COSRX Vitamin C serums with The 6 Peptide Skin Booster Serum labeled 'Blemish & Brightening Booster'; clinically supported synergy to even skin tone, boost glow, and reduce dark spots while maintaining firmness and smooth texture.
Retinol creams and COSRX The 6 Peptide Skin Booster Serum side by side; Wrinkle & Elasticity Booster set designed to enhance firmness, smooth fine lines, and support slow-aging care through peptide + retinol synergy.
Dual set featuring COSRX The 6 Peptide Skin Booster Serum paired with Niacinamide 15 and Hyaluronic Acid 3; total acne care and hydration boosters designed to strengthen skin barrier, balance oil, and deliver firm, glowing results.
Advanced Snail + COSRX 6 Peptide Skin Booster combo displayed; clinical duo formulated for skin renewal, dark spot fading, and radiance; K-beauty pairing for smooth, hydrated, and firm skin.
Minimalist flatlay of COSRX The 6 Peptide Skin Booster Serum with Niacinamide 15 Serum; formulated for acne-prone and sensitive skin, combining peptides and niacinamide for smoother texture, firmness, and sebum control.
Clean product pairing of COSRX The 6 Peptide Skin Booster Serum with Vitamin C 23; Korean glow-enhancing duo boosting radiance, collagen, and firmness; ideal first-step serum combination for dull, sensitive, or aging skin.
COSRX The 6 Peptide Skin Booster Serum paired with The Hyaluronic Acid 3 Serum, labeled 'Peptide + Hyaluronic Acid'; Korean first-step all-in-one serum duo for hydration, firmness, and glow, clinically suitable for sensitive skin barrier repair.
COSRX The 6 Peptide Skin Booster Serum displayed with The Retinol 0.1 Cream under 'Peptide + Retinol'; K-beauty wrinkle and elasticity booster pairing to improve firmness, texture, and slow-aging signs with minimal irritation for sensitive skin.
COSRX The 6 Peptide Skin Booster Serum shown with Advanced Snail 96 Mucin Power Essence, captioned 'Peptide + Snail (Mucin)'; synergy duo designed to enhance glow, elasticity, and barrier strength; suitable as a first-step serum routine for firm, radiant skin.
Top-Fave Selling Fast
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.
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.
Model holding COSRX The 6 Peptide Skin Booster Serum alongside Advanced Snail products; visual promoting peptide and snail synergy to enhance elasticity, glow, and barrier strength in sensitive skin.
COSRX Vitamin C serums with The 6 Peptide Skin Booster Serum labeled 'Blemish & Brightening Booster'; clinically supported synergy to even skin tone, boost glow, and reduce dark spots while maintaining firmness and smooth texture.
Retinol creams and COSRX The 6 Peptide Skin Booster Serum side by side; Wrinkle & Elasticity Booster set designed to enhance firmness, smooth fine lines, and support slow-aging care through peptide + retinol synergy.
Dual set featuring COSRX The 6 Peptide Skin Booster Serum paired with Niacinamide 15 and Hyaluronic Acid 3; total acne care and hydration boosters designed to strengthen skin barrier, balance oil, and deliver firm, glowing results.
Advanced Snail + COSRX 6 Peptide Skin Booster combo displayed; clinical duo formulated for skin renewal, dark spot fading, and radiance; K-beauty pairing for smooth, hydrated, and firm skin.
Minimalist flatlay of COSRX The 6 Peptide Skin Booster Serum with Niacinamide 15 Serum; formulated for acne-prone and sensitive skin, combining peptides and niacinamide for smoother texture, firmness, and sebum control.
Clean product pairing of COSRX The 6 Peptide Skin Booster Serum with Vitamin C 23; Korean glow-enhancing duo boosting radiance, collagen, and firmness; ideal first-step serum combination for dull, sensitive, or aging skin.
COSRX The 6 Peptide Skin Booster Serum paired with The Hyaluronic Acid 3 Serum, labeled 'Peptide + Hyaluronic Acid'; Korean first-step all-in-one serum duo for hydration, firmness, and glow, clinically suitable for sensitive skin barrier repair.
COSRX The 6 Peptide Skin Booster Serum displayed with The Retinol 0.1 Cream under 'Peptide + Retinol'; K-beauty wrinkle and elasticity booster pairing to improve firmness, texture, and slow-aging signs with minimal irritation for sensitive skin.
COSRX The 6 Peptide Skin Booster Serum shown with Advanced Snail 96 Mucin Power Essence, captioned 'Peptide + Snail (Mucin)'; synergy duo designed to enhance glow, elasticity, and barrier strength; suitable as a first-step serum routine for firm, radiant skin.
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.

The 6 Peptide Skin Booster Serum

Multi-Concern All-in One Peptide Booster

This lightweight, toner-like serum blends six powerful peptides to address fine lines, uneven texture, and loss of firmness. Suitable for all skin types, it absorbs instantly to boost elasticity, refine the appearance of pores, and leave skin smoother and stronger with every use.

Size: 150mL (5.07 fl.oz)

Size
$25.00
Minus Plus
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Concerns & Benefits
Concern Suitable Key Benefit Key Ingredient
Fine lines & wrinkles Yes Firms and improves elasticity 6 Peptide Complex
Loss of radiance Yes Boosts glow & vitality Niacinamide
Uneven tone Yes Brightens and refines skin Hyaluronic Acid, Peptides
Sagging skin Yes Visibly lifts and tightens Peptide Blend, Adenosine
Rough texture Yes Smooths and refines surface Panthenol, Peptides
How to Use
  1. Use after cleansing as a toner before ampoule, serum or moisturizer.
  2. Dispense a few drops and pat gently over the face.
  3. Follow with serum and moisturizer.
Product Fact Pack
Info Details
Volume 150mL
Key Ingredients 6 multi-peptides with different effects, Hyaluronic Acid, N-Acetylglucosamine, Allantoin
Clinically Proven Yes (Primary Skin Irritation Tested, Sensitive Skin Irritation Tested, Non-Comedogenic Tested on Acne-Prone Skin)
Expiration 36 months from manufacturing or 12 months after opening
Allergens Hypoallergenic tested
Why COSRX?
Feature 6 Peptide Skin Booster Typical Serum
Multi-peptide actives 6 potent peptides for pores, sebum, firmness, tone, texture Often 1–2 peptides or generic actives
Target concerns addressed Pores/sebum, fine lines, texture, tone, soothing, hydration Addresses only one concern
Texture Lightweight, non-sticky, toner-type feel Heavier or residue-leaving
Skin types Suitable for all skin types, especially those with complex skin concerns Caters to narrower skin types

Clinically proven through independent skin science testing by the Dermacosmetic Skin Science Laboratory Co., Ltd for visible hydration and firmness results.

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

1 SERUM,
6 PEPTIDES

For youthful skin & slow aging

Firmness. Radiance. Smoothness. Deep hydration. Glow.  
Close-up of COSRX The 6 Peptide Skin Booster Serum bottle angled with clear serum dripping down; clean minimal image showcasing lightweight, hydrating texture of the all-in-one Korean first-step booster that strengthens skin barrier, firms texture, and enhances glow.
Model with smooth, hydrated skin holding COSRX The 6 Peptide Skin Booster Serum bottle against a white background; peptide-infused first-step serum formulated to improve firmness, glow, and balance for all skin types including sensitive skin, part of COSRX clinical skincare line.
#Multi6Peptide #SkinTexture+SkinTone

All-in-one, Multi-serum

Clinically proven to deliver youthful, hydrated, and radiant skin.

+162.5%

increase in deep moisture

+76.4%

improvement in skin texture

+40.1%

boost in skin clarity

+24.5%

increase in radiance

+22.2%

improvement in density

Based on clinical trials of 20 subjects.As a result of the clinical trials from Dermacosmetic Skin Science Laboratory Co., Ltd (Sep 18 ~ Oct 31, 2023)

WHO IS IT FOR?

Perfect for anyone who wants one product to do it all, this serum targets firmness, pores, fine lines, dullness, hydration, radiance and uneven tone in a single step.

Formulated through non-comedogenic and primary irritation tests, it’s gentle enough for sensitive, acne-prone, or reactive skin types.

Designed for people looking to prevent early signs of aging while keeping the skin smooth, hydrated, and radiant.

Designed for easy layering, enhancing the affects of subsequent serums and ampoules when used before them.

Model with smooth, hydrated skin holding chemistry equipment for the COSRX The 6 Peptide Skin Booster Serum against a white background; peptide-infused first-step serum formulated to improve firmness, glow, and balance for all skin types including sensitive skin, part of COSRX clinical skincare line. Model with luminous, even-toned skin holding COSRX The 6 Peptide Skin Booster Serum near her face; Korean first-step all-in-one serum infused with six peptides, hyaluronic acid, and amino acids to enhance firmness, glow, and hydration while supporting sensitive skin and slow-aging care. Smiling model holding two bottles of COSRX The 6 Peptide Skin Booster Serum close to her face; radiant skin illustrating the hydrating, firming, and glow-enhancing benefits of the Korean first-step all-in-one peptide serum formulated for sensitive skin and barrier repair. Model with luminous, dewy complexion gently touching her cheek, showing hydrated skin after applying COSRX The 6 Peptide Skin Booster Serum; first-step K-beauty peptide serum clinically tested to enhance glow, firmness, and smoothness for slow-aging skincare routines.

KEY INGREDIENTS

for multiple skin solution

6 peptide complex

Increases hydration, strengthens the skin barrier and maintains moisture

Natural Moisturizing Factors
& Hyaluronic Acids

Helps brighten the skin and improve the look of wrinkles and elasticity

Niacinamide &
Adenosine

Your slow-Aging
Routine Guide

Step by step routine for youthful & healthy skin

Start with Low pH Good Morning Gel Cleanser to gently remove impurities while maintaining the skin’s natural balance.

Step 1 - Cleanse

After cleansing use 2–3 pumps of The 6 Peptide Skin Booster Serum and pat gently into the skin. Absorbs instantly, prepping your skin.

Step 2 - Boost & Prep

Use Advanced The Vitamin C 23 Serum to target dullness, dark spots, and uneven tone for a radiant complexion.

Step 3 - Brighten

Seal in hydration with the Advanced Snail 92 All In One Cream, a lightweight gel-cream that strengthens the skin barrier.

Step 4 - Moisturize

Finish with Vitamin E Vitalizing Sunscreen SPF 50+ for non sticky protection against UV damage without white cast.

Step 5 - Don’t forget to

GET FULL ROUTINE NOW & SAVE 20%

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FAQ
What makes COSRX The 6 Peptide Skin Booster Serum an all-in-one first-step serum?

COSRX The 6 Peptide Skin Booster Serum works as the first step after cleansing to prep and awaken the skin. Its six multi-peptides, hyaluronic acid, and amino acids help improve texture, firmness, and hydration. It enhances the effects of subsequent products, making it an ideal all-in-one base for any skincare routine.

When can I expect to see results from the 6 Peptide Skin Booster Serum?

Visible improvements are typically observed after four weeks of consistent use. In clinical testing, 100% of participants reported smoother and more supple skin, with measured increases in hydration (+162.5%), texture (+76.4%), and clarity (+40.1%). Many users notice enhanced glow and softness within the first week of daily application.

Can I use the 6 Peptide Skin Booster Serum with other actives?

Yes, the formula is designed for compatibility with other active ingredients. It layers well with Vitamin C, Retinol, Niacinamide, Ceramide, and Snail Mucin products to boost hydration, firmness, and radiance. Its low-irritation formula makes it safe for daily use, even in routines that include exfoliating acids or retinoids.

How is the 6 Peptide Skin Booster Serum different from regular peptide serums?

This peptide serum is a versatile starter that helps refine skin texture and boost overall skin health. Formulated with six carefully selected peptides, it supports hydration, brightness, density, radiance, clarity, and smoothness, working well with any next-step product.

Is the 6 Peptide Skin Booster Serum safe for sensitive or acne-prone skin?

Yes. Clinical studies from the Dermacosmetic Skin Science Laboratory confirm that the serum is safe for sensitive skin and suitable for acne-prone conditions. It is non-comedogenic and clinically proven, meaning it won’t clog pores or cause irritation, even with continuous use.

How can I integrate this serum into my skincare routine?

Apply the 6 Peptide Skin Booster Serum immediately after cleansing, as a toner before essence and thicker ampoule/serum. It acts as a hydration and prep step, enhancing the performance of following treatments like serums, ampoules, or creams. Use twice daily for optimal firmness, glow, and slow-aging benefits.

Who should use the 6 Peptide Skin Booster Serum?

This serum is suitable for all skin types, including sensitive and acne-prone skin. It has been clinically tested for non-irritation and non-comedogenic properties, ensuring that it does not clog pores. It is ideal for those seeking a single first-step product that enhances firmness, smoothness, and glow while maintaining a healthy skin barrier.

Overall rating: 4.6998563 / 5 from 15989 reviews.

AI Generated Review Summary

Customers love the D_The 6 Peptide Skin Booster Serum for its smooth, silky texture and hydrating effects. The serum is praised for its effective ingredients and noticeable results in improving skin firmness and elasticity. Suitable for all skin types, it absorbs quickly and leaves skin feeling plump and healthier.

Summary topics

  • Skin Feel: 7%
  • Effective Ingredients: 13%
  • Visible Results: 6%
  • Product Texture: 16%
  • Skin Appearance: 9%

Review topics: ["feels","texture","improvement","use","skin","glow","looks","difference","serum","women","skincare","brand"].

Review highlights

  • "With continued use, my complexion looks noticeably smoother and incredibly radiant." — Ronav2
  • "Peptide Skin Booster: Transformative efficacy, luxe ingredients, sleek packaging, silky texture, delicate scent." — Enin3
  • "I love the ingredients the texture love the packaging that it came in and it makes my skin feel so good and soft." — Queeng87

Reviews

This is the best skincare

"This is the best skincare line I have ever used! Amazing improvement in my skin. Originally purchased to help with rosacea and it has definitely reduced redness and sensitivity but it has also completely changed my skin for the better: smaller pores, hydration, reduced lines and other signs of aging, i get compliments on my skin all the time!!!"

— Karen L. (5/5)

Good add to the routine

"One of my favorite products. Its gentle and never burns even on broken barrier skin. I use it morning and night and feel like it helps give skin extra moisture and bounce."

— Tori m. (5/5)

I really like this product

"The COSRX The 6 Peptide Skin Booster Serum is a very lightweight, watery serum that absorbs quickly and layers well with other skincare products. It mainly focuses on hydration and improving skin texture, making the skin feel softer, smoother, and slightly plumper over time."

— Olivia (5/5)

This is very light and

"This is very light and hydrating. I really think the serum is helping plump up my skin. I like the bottle design too. :)"

— Jessica Z. (5/5)

This is a perfect serum

"This is a perfect serum that penetrates your skin quickly so you can layer with additional items. The ingredients are exactly what I am looking for in a peptide serum."

— Barbara S. (5/5)

My favorite serum. You need

"My favorite serum. You need only a pump so it lasts forever. It is hydrating and plumping."

— Chelsea F. (5/5)

Highly Recommend

"Has a really lightweight, almost watery texture that absorbs quickly and doesn’t leave any sticky feeling behind. Most importantly, it didn’t irritate my skin or cause any breakouts. After using it consistently my skin is starting to feel smoother. It has not been an overnight transformation, but I have noticed that my skin is looking healthier and more even as time goes on. It also layers really well with the rest of my skincare, which I appreciate. If you have sensitive skin this is a solid option. It’s gentle, effective, and easy to incorporate into your routine."

— Breana C. (5/5)

I’ve been using the COSRX

"I’ve been using the COSRX The 6 Peptide skin booster for a few weeks now and I’m really happy with the results. My skin feels smoother, and I’ve noticed that my fine lines and pores look more refined"

— Kanty K. (4/5)

I ran out of the

"I ran out of the 6 Peptide Skin Booster, I notice the difference immediately on my skin. I restocked and I will never let this happen again."

— Valerie C. (5/5)

Love this product! My second

"Love this product! My second of many more purchases to come. It helps even out my skin tone and provides just the right amount of moisture to keep my combination skin hydrated but not oily. Hope they add some more anti-acne ingredients in the future though, as my chin congestion hasn't changed and I've been using the product for 6 months now."

— Inga S. (5/5)

Q&A