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COSRX The 6 Peptide Skin Booster

COSRX The 6 Peptide Skin Booster

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Regular price £16.97 GBP
Regular price £20.97 GBP Sale price £16.97 GBP
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Size

Product details

Brand
COSRX
Size
150ml
Scent
Fragrance-free formula
Skin type
All, incl. sensitive
Texture & finish
Thin, water-like texture; sinks in fast, never sticky
Product benefits
Smooths texture, softens fine lines, calms and brightens
Active ingredients
Six-peptide complex (incl. Copper Tripeptide-1, Acetyl Hexapeptide-8), Niacinamide, Sodium Hyaluronate
Special ingredients
Allantoin, acetyl glucosamine, amino acid blend
When to use
AM & PM, on clean damp skin before serums
Free from
Fragrance Free, Drying Alcohol Free, Silicone Free, Paraben Free, Sulfate Free
Claims
Vegan, Cruelty Free, SCPN Notified, CPNP Notified
Made in
Made in Korea

About this item

  • Six peptides, one booster: SH-Polypeptide-121, Copper Tripeptide-1 and four more team up to smooth texture and soften the look of fine lines.
  • Calms and evens tone: niacinamide helps even skin tone and calm visible redness, with allantoin to soothe.
  • Lasting light hydration: sodium hyaluronate and an amino acid blend draw in moisture without any sticky or heavy feel.
  • Kind to sensitive skin: vegan, fragrance-free formula with no parabens, sulfates, silicones or drying alcohol.
  • Fits any routine: water-light texture sinks in within a minute or two; press in 2-3 pumps AM and PM, and it sits comfortably alongside retinol routines.
£16.97(£11.31/100ml)
In stock
Return within 61 days of receipt — hassle-free refund Returnable within 61 days of receiptItem can be returned in its original condition for a full refund within 61 days of receipt.Read full return policy
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View full details
  • Vegan
  • Cruelty Free
  • Fragrance Free
  • Drying Alcohol Free
  • Silicone Free
  • Paraben Free
  • Sulfate Free
  • Made in Korea
  • SCPN Notified
  • CPNP Notified

Description

COSRX The 6 Peptide Skin Booster brings gentle renewal to all skin types with its lightweight formula. This calming serum works with six powerful peptides to help smooth fine lines, even skin tone, and boost your natural glow. Perfect for daily use, it adds comfort to sensitive skin while tackling common concerns like uneven texture and visible pores. The barely-there feel sinks in quickly, leaving your skin feeling soft and looking fresh. Free from harsh ingredients, this booster fits easily into any skincare routine, morning or night. Give your skin the daily care it needs with this simple yet effective step toward healthier-looking skin.

How This Gentle Booster Helps Your Skin

The 6 Peptide Skin Booster from COSRX works in many gentle ways to help your skin look and feel its best. The six peptides team up to smooth your skin's texture and help it bounce back. They also work to make fine lines less visible over time. If you've noticed larger pores or shiny areas, this formula helps calm those concerns too.

This booster brings a nice glow to dull skin and helps even out skin tone. The thin, water-like texture feels cool and fresh, never sticky or heavy. It adds moisture without making skin feel greasy, which is why it works well for all skin types. Even if your skin gets upset easily, the soothing mix of ingredients helps strengthen your skin's natural barrier, keeping the good stuff in and the bad stuff out.

The Good Stuff Inside

What makes this booster special is its mix of kind-to-skin ingredients. The star players are six peptides that each have a special job. SH-Polypeptide-121 helps wake up your skin's natural plumping powers. Copper Tripeptide-1 works on making skin feel firmer and look smoother. Another peptide helps control shine and make pores less noticeable.

Beyond the peptides, you'll find niacinamide to help even skin tone and calm redness. Sodium hyaluronate pulls moisture into your skin and helps it stay there. The formula skips harsh extras - it's free from parabens, sulfates, and added scents. This makes it a good fit for sensitive skin. All these good-for-you ingredients work together to help your skin look fresh without any harsh side effects.

  • Cruelty-free and mostly vegan (contains soybean oil)
  • No parabens, sulfates, or added fragrance
  • Comes in recyclable packaging

How to Make It Part of Your Day

Adding this booster to your routine is simple. Start with clean skin that's still a bit damp. Press 2-3 pumps onto your face and neck using your fingers. The thin texture soaks in quickly, usually within a minute or two. For extra dry areas, you can layer it by adding a second application where needed.

This booster plays well with other skincare products. In the morning, use it before your vitamin C serum and sunscreen. At night, it works great before night creams or treatments. If you use retinol products, this booster can help keep your skin comfortable. For the best results, use morning and night. Most people see better skin texture within 3-4 weeks, and improvements in fine lines after about 6 weeks of daily use.

  • AM: Cleanse → Peptide Booster → Vitamin C → Moisturizer → Sunscreen
  • PM: Cleanse → Peptide Booster → Treatment → Night Cream

Who Will Love This Booster

This gentle formula works for all skin types, but some people will find it extra helpful. If you have skin that gets upset easily, the soothing peptides can help calm things down. People with combination or oily skin love how light it feels while still adding moisture. Since it isn't heavy or greasy, it's perfect for warmer months but works year-round too.

Age-wise, it's a good pick for anyone 25 and up. Younger folks can use it to keep skin happy and prevent early signs of aging. Those in their 30s and beyond will notice how it helps with fine lines and skin firmness. One bottle lasts about 2-3 months with daily use, making it a good value. The simple pump bottle keeps the formula fresh and makes it easy to get just the right amount each time.

Real Results You Can See and Feel

What can you expect when you add this booster to your routine? Right away, your skin will feel more hydrated and soft to the touch. The light formula gives a subtle plumping effect that makes skin look fresh. Most people notice their skin feels smoother and more comfortable after just a few days.

With steady use, you'll start to see even better results. After 2-3 weeks, many notice their skin looks firmer and bouncier. Around the 4-week mark, fine lines often appear less deep, and skin tone becomes more even. The subtle glow becomes more lasting, not just a temporary effect. People with visible pores report they seem less noticeable after regular use. Unlike some treatments that work quickly but then plateau, this booster keeps improving your skin over time.

  • Right away: Soft, hydrated feeling
  • 2-3 weeks: Better elasticity and smoothness
  • 4-6 weeks: Less visible fine lines and more even tone

Ready to give your skin the gentle boost it's been asking for? Add COSRX The 6 Peptide Skin Booster to your daily routine and watch as your skin transforms into its smoothest, brightest version. Your skin works hard every day - now's the time to show it some love with ingredients that truly care. Tap into the power of peptides and wake up to skin that feels as good as it looks. Your calm, glowing skin journey starts with just a few drops!


Disclaimer: Packaging and product images may be updated by the manufacturer without notice. The item you receive may differ in appearance from the images shown, and colours may vary slightly between screens.

How to Use

Apply the serum after cleansing on damp skin, using 2-3 pumps for face and neck. Allow 1-2 minutes for absorption before applying subsequent products. For enhanced effects, layer 2-3 times. It can be paired with retinol for anti-aging, used under vitamin C serums for brightness, or before hyaluronic acid serums for hydration. Store at room temperature, avoiding direct sunlight, and use within 12 months of opening. The product typically lasts 2-3 months with daily use (10 mL/month). Suitable for all skin types, especially sensitive, combination, and acne-prone skin, and effective year-round. For routine, use in the morning after cleansing, followed by moisturizer and SPF, or at night after double cleansing with a moisturizer. Sensitive skin can benefit from barrier repair creams to complement its soothing effects.

Ingredients

Ingredients 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, GIycine, Threonine, Arginine, Proline, Betaine, So-dium 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

Key Ingredients

SH-Polypeptide-121, Copper Tripeptide-1, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Acetyl Hexapeptide-8, Niacinamide, Sodium Hyaluronate

Disclaimer: Ingredients may be updated by the manufacturer without notice. For the most current and accurate list, always refer to the product packaging.

Complete Your Calm Ritual

Better together

Complete Ritual

£49.91 £47.42

BUILD YOUR CALM RITUAL

Routine Recommendation

Step 1
COSRX Salicylic Acid Daily Gentle Cleanser

Cleanser

COSRX Salicylic Acid Daily Gentle Cleanser

£7.47

Step 2
COSRX AHA/BHA Clarifying Treatment Toner

Toner

COSRX AHA/BHA Clarifying Treatment Toner

£12.97

Step 3
COSRX The 6 Peptide Skin Booster

Serum

COSRX The 6 Peptide Skin Booster

£16.97

Step 4
COSRX The Retinol 0.1 Cream

Cream

COSRX The Retinol 0.1 Cream

£16.47

Step 5
BEAUTY OF JOSEON Relief Sun: Rice + Probiotics SPF50+ PA++++

Sunscreen

BEAUTY OF JOSEON Relief Sun: Rice + Probiotics SPF50+ PA++++

£13.97


Six-peptide complex · niacinamide · fragrance-free

A water-light first layer that makes the rest of your routine work harder.

A booster built around a six-peptide complex with niacinamide — thin enough to press into damp skin in seconds, and designed to sit under whatever comes next.

Fragrance-freeAll skin typesAM & PM
COSRX Booster 150ml COSRX The 6 Peptide Skin Booster

What does it do?

A booster, not another heavy step.

It goes on first, at the point where skin is still damp, and gets out of the way.

Smoother-looking texture

A six-peptide complex — including copper tripeptide-1 and acetyl hexapeptide-8 — supports the look of smoother, more even skin.

Calmer, more even tone

Niacinamide helps even the look of tone and settle visible redness, with allantoin alongside it.

Light, lasting hydration

Sodium hyaluronate and an amino acid blend draw moisture in without any sticky or heavy feel.

What's in it?

Six peptides in a water-thin base.

The peptide complex leads; niacinamide and humectants keep skin comfortable while it works.

06

Six-peptide complex

The formula's headline — six peptides including copper tripeptide-1 and acetyl hexapeptide-8, chosen for the look of smoother skin.

01

Niacinamide

A well-established ingredient for the look of even tone, used here alongside allantoin for comfort.

02

Sodium hyaluronate + amino acids

Humectants and an amino acid blend that hold water at the surface without weight.

COSRX The 6 Peptide Skin Booster - experience

How does it feel?

So thin you will wonder if it is there.

A water-like texture that sinks in within a minute or two — press two or three pumps onto clean, damp skin and carry on. It leaves no film, so serums and creams layer straight over the top.

TextureWater-thin liquid
FeelAbsorbs in a minute
FinishBare, no residue

Is it for you?

For routines that need a foundation, not a finish.

Made for people who layer, and want the first layer to count.

  • Skin that looks uneven or dull in texture
  • Anyone building a peptide step into an existing routine
  • Sensitive-feeling skin and fragrance-free routines
  • Layering under serums, creams and sunscreen
Absorbs well, feels wonderful

It's very thin and light, so I use it as an essence. Absorbs very well and adds some hydration. Feels wonderful too!

First new product in a while — watching for irritation

I like it. It doesn’t irritate my skin at all. I usually do two layers on damp skin, the first step in my routine. It is hydrating and I think my skin does look slightly plumper.

Not sure the softness was really coming from this step, so I tested it

I have a combination skin, dry in the winter and sometimes can be sensitive. I use it as a booster before my regular toner since it's how I was recommended to use it. And I did noticed it makes my skin A LOT softer ! I wasn't sure at first so I stopped using it for a week and just after a couple of days I could notice my skin didn't felt as nice .

Expected serum-strength change, found a gentler helper instead

My skin likes it. It’s not going to make major changes like retinols, but it can hydrate skin and be a great second step in a routine with stronger actives. My skin gets less oily and feels calmer, less red, and more hydrated- not solely thanks to this but it does seem to help.

Needed something hydrating for retinol nights that wouldn't fight the tret

i loved it found it really hydrating especially on tret nights but nothing groundbreaking but i didn’t really expect it to

The quiet first layer, morning and night.

COSRX The 6 Peptide Skin Booster £16.97