Search  for anything...

COSRX 6X Peptide Collagen Skin Booster Toner Serum for Dull Skin, 5.07 oz

  • Based on 12,357 reviews
Condition: New
Checking for the best price...
$21.00 Why this price?
Save $4.00 was $25.00

Buy Now, Pay Later


As low as $5 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Monday, Aug 24
Order within 4 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Scent: 6 Multi Peptide Complex (1 Pack)


Features

  • Skin Booster Toner: Skin Boosting Serum with 6 Peptides including Copper Peptides that improve skin elasticity, fine lines, pores, and radiance. Boost your skin's condition and achieve multiple benefits with this serum.
  • First Step of Skincare: This lightweight serum with a toner-like texture absorbs quickly into the skin, making it a great first step in your daily skincare routine. Its quick absorption allows for easy layering with other products.
  • Key Ingredients: 6 Peptides that boost skin elasticity, reduce post hyperpigmentation, control pores, renew skin, calm and alleviate skin, and improve the look of fine lines and wrinkles.
  • How to Use: After cleansing, apply 2-3 pumps of the Serum on your face. Layer on your favorite moisturizer for additional hydration. Best when used with the COSRX Snail 96 Essence and/or the COSRX Retinol 0.1 Cream.

Description

6-Peptide Skin Booster Copper Peptide Serum Pink Peptides Eye Patch Copper Peptide Cream Peptides Hydrogel Mask PDRN Exosome WrappingMask Snail Mucin Eye Cream

Product Dimensions ‏ : ‎ 1.73 x 1.73 x 5.91 inches; 5.29 ounces


Item model number ‏ : ‎ SC40TR34


Manufacturer ‏ : ‎ COSRX


Best Sellers Rank: #722 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #25 in Facial Serums


#25 in Facial Serums:


Customer Reviews: 4.6 4.6 out of 5 stars (12,357)


Skin Type: All


Product Benefits: Radiant Skin


Target Use Body Part: Face


Scent Name: 6 Multi Peptide Complex (1 Pack)


Special Ingredients: Peptide


Item Form: Essence


Skin Tone: All


Brand Name: COSRX


Number of Items: 1


Global Trade Identification Number: 58


Item Type Name: Liquid


Manufacturer: COSRX


Model Number: SC40TR34


Manufacturer Part Number: SC40TR34


Item Weight: 150 g


Item Volume: 150 ml


Unit Count: 5.07 Fluid Ounces


Material Features: Paraben Free


Active Ingredients: peptides


Material Type Free: Bisphenol A Free, Fragrance Free, Phthalate Free, Sulfate Free


Recommended Uses For Product: Collagen Booster,Reduces Hyperpigmentation,Targets Acne,Moisturizing,Reduces Fine Lines And Wrinkles


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Significant improvement in my skin tone and texture
Scent: 6 Multi Peptide Complex (1 Pack)
I've been using this for well over a year and I use it after I get out of the shower in the morning, and at night when I wash my face. It allows for deeper penetration of other skin care products and I've noticed a huge difference in the texture of my skin as well. It is highly effective with no scent. I have a very mild case of rosacea (self diagnosed, lol). But this has made a significant difference in evening my skin tone and getting rid of the redness. I also apply it to my neck and chest area and have noticed a difference as well, in the way my other products work after applying it. Especially products used to lighten any dark spots like freckles etc. I've noticed a HUGE difference in that area. Because I am fair skinned, unfortunately I am prone to freckles since I was younger. So if I go out in the sun, I get sprinkled with freckles on my nose and upper cheeks as well as my chest and shoulders and although I use SPF, I do live in Florida and I've noticed since moving here from the north my skin looks so much worse. But when using this along with some other dark spot remover products it has made a huge difference in the way the products work! It's a very watery consistency but do not put it on a pad like you would for a toner this is not a toner you want it to absorb into your skin as much as possible. It is not thick at all it comes out basically like water and soaks right into your skin with a few light pads give it about a minute and you'll be ready to move on to your next step in your skincare routine. For the price I think the value for your money is excellent! I will never not have this in my skincare routine, two thumbs up and if I had more thumbs I'd give it more! Haha! And five stars, if I could give it more stars I would! ... show more
Reviewed in the United States on February 21, 2026 by kokie marie

  • Excelente product💕
Scent: 6 Multi Peptide Complex (1 Pack)
I’ve been using this skin booster for a while, and I absolutely love it! It leaves my skin feeling hydrated, smooth, and refreshed, and I’ve noticed my complexion looks healthier and more even over time. The lightweight texture absorbs quickly and layers well with the rest of my skincare routine. The only downside is the bottle. It doesn’t look very nice and feels a bit cheap compared to how amazing the product inside is. I really hope the brand improves the packaging because the formula is truly excellent. Overall, I highly recommend it and will definitely purchase it again. ... show more
Reviewed in the United States on July 12, 2026 by JennyNS

  • One of the most underrated "support" products in my skincare routine
Scent: 6 Multi Peptide Complex (1 Pack)
I've been using the COSRX The 6 Peptide Skin Booster Serum for a little over a year and a half, and after going through multiple bottles, I can confidently say it's earned a permanent spot in my skincare routine. It's not the kind of product that delivers dramatic overnight results, but it's one of those formulas that quietly improves the performance of everything you apply afterward. Sometimes those end up being the products worth repurchasing the most. The texture is one of my favorite things about it. It's lightweight and watery—almost like an essence—but has just enough body to spread easily across the skin. It absorbs within seconds, leaves no sticky residue, and layers beautifully under every serum, moisturizer, sunscreen, and even makeup I've tried. One thing I really appreciate is the ingredient lineup. As the name suggests, it contains six different peptides, which help support the skin barrier and improve the appearance of elasticity over time. It also includes niacinamide to brighten the complexion and help refine the look of pores, along with hyaluronic acid to provide lightweight hydration. While I don't expect any one ingredient to perform miracles, I like that this formula focuses on supporting overall skin health rather than relying on harsh actives. It's gentle enough for daily use, even on my sensitive skin. I get the best results when I apply it immediately after exfoliating, and I also use it with my Medicube Age Booster Pro in Booster Mode. It provides the perfect amount of slip for the device, but more importantly, I've genuinely noticed that my skincare absorbs much better afterward. My skin feels like it drinks in the rest of my routine instead of having products just sit on the surface. After using it consistently for over 18 months, my skin looks smoother, more hydrated, and noticeably more radiant. One of the biggest compliments I receive is that my skin has a healthy "glass skin" glow, and I honestly think this serum has been one of the key products that helped me achieve that. It leaves my skin looking fresh and luminous without ever feeling greasy or heavy. Pros: - Lightweight, essence-like texture that absorbs quickly - Six-peptide formula with niacinamide and hyaluronic acid - Helps improve the absorption of the skincare applied afterward - Layers beautifully with other skincare and makeup - Gentle enough for daily use on sensitive skin - Leaves skin looking hydrated, smooth, and radiant - Pairs exceptionally well with the Medicube Age Booster Pro Cons: - Results are gradual, so consistency is important. - If you're looking for dramatic overnight changes, this isn't that type of product. After more than a year and a half of consistent use, this is one of the few products I automatically repurchase before I run out. It doesn't rely on flashy claims or instant results—it simply makes my entire skincare routine work better. If your goal is healthier, more hydrated, glowing skin over time, I think this serum is absolutely worth adding to your routine. ... show more
Reviewed in the United States on July 2, 2026 by Leona

  • A Lightweight Booster That Instantly Smooths and Brightens
Scent: 6 Multi Peptide Complex (1 Pack)
The COSRX 6X Peptide Collagen Skin Booster Toner Serum is one of those rare “first step” products that actually makes a visible difference. The texture is ultra‑light — almost watery — but it absorbs immediately and leaves the skin feeling smoother and more refreshed. It’s packed with six peptides and collagen, so it gives the skin a subtle plumping effect right after application. After using it consistently, I noticed my complexion looking more even and less dull. It layers beautifully under serums and moisturizers, and it really does help the rest of your routine absorb better. This booster adds that healthy, hydrated glow without any heaviness or stickiness. It’s gentle, fast‑absorbing, and perfect for prepping the skin for the rest of your routine. A great choice for anyone dealing with dullness, uneven tone, or loss of firmness. ... show more
Reviewed in the United States on July 9, 2026 by Jolynn

  • Soft skin
Scent: 6 Multi Peptide Complex (1 Pack)
This product is great. It dries reasonably fast spreads easy with a little going a long way. I find it is effective at moisturizing my skin and improving appearance of texture, wrinkles, and glow. I work outside a lot so my skin is constantly being put through the ringer. Product has no odor which I consider important. Overall great value for money and I would buy again. ... show more
Reviewed in the United States on July 13, 2026 by Carrie Mitchell

  • Nice
Scent: 6 Multi Peptide Complex (1 Pack)
I like this product as it’s hydrating but there is no wat to know if this actually works. How much of the peptides actually get into the skin and what does results look like is questionable.
Reviewed in the United States on May 11, 2026 by Thoriq

  • ⭐⭐⭐⭐⭐ The One Skincare Product I’ll Never Be Without!
Scent: 6 Multi Peptide Complex (1 Pack)
I’ve been using this snail mucin for almost a year, and it has become the one product I never want to run out of. At 53 years old, my skin has never looked smoother or more even. My complexion has a healthy glow, feels incredibly hydrated, and I really don’t have many deep fine lines. What I love most is how soft and plump my skin feels, especially when I wake up in the morning. It absorbs beautifully, isn’t sticky, and layers perfectly with the rest of my skincare routine. Over time, I’ve noticed brighter, calmer, healthier looking skin with a texture that’s noticeably smoother. I’ve actually received compliments on my skin, and I truly believe this product has played a big part in that. If you’re looking for something that delivers real results with hydration, texture, and radiance, I can’t recommend this enough. It’s earned a permanent place in my routine, and I’ll definitely keep repurchasing! 💕 ... show more
Reviewed in the United States on July 31, 2026 by Kindle Customer

  • Truly impressive results — cleared my skin tone fast and keeps my face looking healthier every day
Scent: 6 Multi Peptide Complex (1 Pack)
This COSRX 6X Peptide Collagen Booster Toner Serum has been a fantastic addition to my skincare routine. I originally bought it hoping to fix some white patches on my face caused by a burn from Brut aftershave. To my surprise, within just a week, the patches faded significantly and my skin tone became even again. That alone made the product worth it, but the benefits didn’t stop there. The formula feels premium — lightweight, fast‑absorbing, and never sticky. The combination of copper peptides, niacinamide, and hyaluronic acid works beautifully together. My skin feels cleaner, smoother, and more refreshed after every use. It gives a healthy glow without any irritation, and the hydration lasts throughout the day. Over time, I’ve noticed my skin looking firmer and more refined, so I’m confident it has real anti‑aging benefits as well. The bottle size is generous, and a little goes a long way, making it great value for the quality. It layers well with other products, doesn’t pill, and works for both morning and night routines. The scent is mild and pleasant, and the overall feel on the skin is soothing. All in all, this is a great product that delivers visible results quickly and continues to improve the skin with consistent use. Highly recommended for anyone looking for brighter, smoother, and healthier‑looking skin. ... show more
Reviewed in the United States on April 12, 2026 by Madan

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...