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COSRX The 6 Peptide Skin Booster Serum - Ulta Beauty - 2 of 4COSRX The 6 Peptide Skin Booster Serum - Ulta Beauty - 3 of 4COSRX The 6 Peptide Skin Booster Serum - Ulta Beauty - 4 of 4
COSRX The 6 Peptide Skin Booster Serum - Ulta Beauty - 1 of 4

COSRX The 6 Peptide Booster Serum - 30ml - Ulta Beauty

$9.00
Size1.01 fl oz

In Stock

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At a glance

About this item

Highlights

  • Provides overall skin benefits such as pore&sebum care, increased skin firmness, reduction of fine lines, smoother skin texture, and a more even skin tone
  • Improves skin texture and tone with daily use
  • Non sticky, lightweight texture to absorb quickly

Description

The 6 Peptide Skin Booster Serum from COSRX enhances overall skin condition as your first step serum.


Key Ingredients:

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


How to use:

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.


All COSRX products are dermatologist-tested, hypoallergenic, paraben-free, sulfate-free, phthalate-free, and alcohol-free.
Scent: Unscented
Trial/Mini/Travel Size: Yes
Health Facts: Alcohol-Free
Product Warning: Eye irritant
Product Form: Liquid
Beauty Purpose: Fine Line Reduction, Anti-Aging, Acne-Prone, Combination, Dark Spot Reduction, Pore Reduction, Oil Control, Brightening, Smoothing, Anti-Acne
Recommended Skin Type: Acne-Prone, Combination, Dry, Mature, Extra Sensitive, Normal, Oily, Sensitive
TCIN: 94264826
UPC: 8809598455900
Item Number (DPCI): 342-01-2114
Origin: Imported
Healthcare Disclaimer:
Content on this site is for reference purposes only. Target does not represent or warrant that the nutrition, ingredient, allergen and other product information on our Web or Mobile sites are accurate or complete, since this information comes from the product manufacturers. On occasion, manufacturers may improve or change their product formulas and update their labels. We recommend that you do not rely solely on the information presented on our Web or Mobile sites and that you review the product's label or contact the manufacturer directly if you have specific product concerns or questions. If you have specific healthcare concerns or questions about the products displayed, please contact your licensed healthcare professional for advice or answers.
If the item details aren’t accurate or complete, we want to know about it.

Shipping details

Estimated ship dimensions: 1.07 inches length x 1.07 inches width x 1.14 inches height
Estimated ship weight: 0.11 pounds

Return details

This item can be returned to any Target store or Target.com.
This item must be returned within 90 days of the date it was purchased in store, delivered to the guest, delivered by a Shipt shopper, or picked up by the guest.
See the return policy for complete information.

Q: Please provide the actual ingredients list as shown on package/bottle.

submitted by detailsdetails - 10 months ago

  • A: Full ingredient list from COSRX website: 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

    submitted byAnna B - 6 months ago

  • A: Collagen Boosting SH-Polypeptide-121 Retexturize Copper Tripeptide-1 Excess Sebum & Pore Care Dipeptide Diaminobutyroyl Benzylamide Diacetate Brightening Oligopeptide-68 Soothing Palmitoyl Tripeptide-

    submitted byTammyRN - 7 months ago

Q: what is the percentage of copper peptide?

submitted by heathjez - 7 months ago

  • A: The Copper Tripeptide-1 is less than .1% of the ingredients.

    submitted byCOSRX - 5 months ago
    Brand expert

Q: Ingredients list please!

submitted by detailsdetails - 1 year ago

  • A: Full ingredient list from COSRX website: 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

    submitted byAnna B - 6 months ago

Q: How much is in this bottle? Could not find ounces?

submitted by Tlynn - 2 years ago

  • A: A photo on one of the reviews shows it as being a large bottle: 150ml, which is about 5 oz.

    submitted byElliptigo Girl - 2 years ago

Q: When do you incorporate this into your skincare regime?

submitted by UserMG - 2 months ago

Q: Does this contain fragrance?

submitted by Rachel - 3 months ago

Q: Is it safe during pregnancy?

submitted by Kris - 3 months ago

Q: Is it breastfeeding friendly

submitted by Rai - 5 months ago

Q: Hi, can I use a vitamin c serum after applying this? I've read that copper peptide and vitamin C used in the same routine cancel each other's benefits out

submitted by AnneAnneAnneAnneAnne - 1 year ago
See all questions (9)

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Guests are saying

The Cosrx 6 Peptide Skin Booster Serum has garnered positive feedback for its lightweight, hydrating formula that absorbs quickly without leaving a sticky residue. Guests appreciate its ability to improve skin texture, tone, and hydration, making it a valuable addition to their skincare routines. The product is scent-free, suitable for various skin types, and comes in a convenient pump bottle, enhancing its usability and effectiveness. Many guests have reported visible improvements in their skin after consistent use.
    Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
    4.6 out of 5 stars with 26501 reviews
    42% would recommend
    7 recommendations
    5 out of 5 stars
    20 April, 2026
    originally posted on cosrx
    Image

    I have just started to

    [This review was collected as part of a promotion.] I have just started to use this product (1 week) with two other products from this brand and I am already seeing a difference. It is easy to use. It gives you the directions and a little goes a long way. I will definitely want to order more.
    Ambriel B.
    Did you find this review helpful?
    4 out of 5 stars
    19 April, 2026
    originally posted on influenster.com
    Image

    A great addition to the skincare routine

    [This review was collected as part of a promotion.] I’ve been using the COSRX Skin Booster Serum for a few weeks now, and overall, it’s a solid addition to my routine, just not quite a miracle product. The first thing I noticed is how lightweight and watery the texture is. It absorbs almost instantly and layers really well with other products, which makes sense since it’s designed as a “first-step” serum to prep your skin. My skin definitely felt softer and more hydrated after using it consistently, and it gave a subtle glow without feeling greasy. The formula uses multiple peptides along with hydrating ingredients to improve texture, elasticity, and overall radiance. That said, the results are more subtle than dramatic. While my skin felt smoother, I didn’t see a huge difference in fine lines or firmness on its own. It works best as a supporting product rather than a standout treatment—kind of like a booster that helps everything else perform better rather than stealing the show. I also appreciate that it’s gentle and suitable for sensitive or acne-prone skin, since it’s non-comedogenic and designed to be low-irritation. No breakouts or irritation for me, which is always a win. Overall, this is a great hydrating prep step if you like layering skincare or want something lightweight and versatile. Just don’t expect overnight transformation, it’s more of a steady, supportive product than a game-changer.
    RebeccaC
    Did you find this review helpful?
    5 out of 5 stars
    7 April, 2026
    originally posted on cosrx
    Image

    I really like this, it’s

    [This review was collected as part of a promotion.] I really like this, it’s very thin, almost watery. But it feels great on the skin and is very hydrating.
    Katie S.
    Did you find this review helpful?
    5 out of 5 stars
    4 April, 2026
    originally posted on cosrx
    Image

    This is in my skincare

    [This review was collected as part of a promotion.] This is in my skincare routine morning and night. First time I have ever used a booster and won’t be my last. Such a great remedy for fine lines.
    Keely B.
    Did you find this review helpful?
    5 out of 5 stars
    4 April, 2026
    originally posted on influenster.com
    Image

    Serum that packs peptides

    [This review was collected as part of a promotion.] This is a great serum. It has visibly changed the texture of my skin. I feel like my skin looks plumper and more hydrated. The peptides are amazing and my skin feels super soft.
    CrystalH
    Did you find this review helpful?
    5 out of 5 stars
    3 April, 2026
    originally posted on influenster.com
    Image

    Lightweight, hydrating serum that improves skin te

    [This review was collected as part of a promotion.] I’ve been using this serum for a few weeks and really like how lightweight if feels on the skin . My skin looks more hydrated and smooth, and over time I’ve noticed a subtle improvement in texture and overall glow. It layers well with other skincare products and doesn’t cause irritation, which is a big plus. A little goes a long way, so the bottle last quite a while. Overall it’s a grate everyday serum if you looking to boots hydration and improve skin appearance.
    ViktoriiaK
    Did you find this review helpful?
    5 out of 5 stars
    2 April, 2026
    originally posted on influenster.com
    Image

    Great for Sensitive skin

    [This review was collected as part of a promotion.] Great for my sensitive skin. I struggle to find products that don’t further irritate my skin but this was perfect which I really enjoyed. I am excited
    McKenzieO
    Did you find this review helpful?
    5 out of 5 stars
    2 April, 2026
    originally posted on influenster.com
    Image

    Refreshing

    [This review was collected as part of a promotion.] I loved this product especially after a shower. It is so hydrating and easy to apply. It didn’t leave any sticky residue and was easy to combine with my other skincare
    MelissaP
    Did you find this review helpful?
    5 out of 5 stars
    31 March, 2026
    originally posted on cosrx
    Image

    "I love the application and

    [This review was collected as part of a promotion.] "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.
    Did you find this review helpful?
    4 out of 5 stars
    30 March, 2026
    originally posted on cosrx
    Image

    Great

    [This review was collected as part of a promotion.] Great. Quick absorption.
    Solange L.
    Did you find this review helpful?
    5 out of 5 stars
    26 March, 2026
    originally posted on influenster.com
    Image

    It helped clear my face.

    [This review was collected as part of a promotion.] I loved the packaging. It has no scent. With just a little amount you get all over your face. I lasted me forever till a year later and I still have some left. I use it every day. It absorbs to the skin super nicely and you get a glowy finish.
    JuanaP
    Did you find this review helpful?
    5 out of 5 stars
    26 March, 2026
    originally posted on influenster.com
    Image

    Good quality product

    [This review was collected as part of a promotion.] Really great product. Goes on smooth, it’s nice and light. The quality is very good and I enjoy this brand. I felt like my skin looked better within a few days of using. I reconnected this product.
    PhoebeD
    Did you find this review helpful?
    5 out of 5 stars
    25 March, 2026
    originally posted on cosrx
    Image

    One Of COSRX's Best Products

    [This review was collected as part of a promotion.] This Peptide Booster is a staple in my daily skin routine. It beats others hands down and I will never change this product brand. They dont skimp on product volume or ingredients. There is so much in the bottle that along with using on my face, neck and chest I also use it on my arms. If you are a peptide fan, and you should be if not, this product wont disappoint, I promise
    Janet F.
    Did you find this review helpful?
    5 out of 5 stars
    Thumbs up graphic, would recommend
    25 March, 2026

    Great Multi Purpose Serum

    This is a great serum with multiple benefits. Very light weight and absorbs into the skin quickly. I use this after my toner. Has made a difference in my skin and it totally boosts the effectiveness of my other skincare products I use after. Highly recommend. Been using this twice a day for a year.
    Kate
    Did you find this review helpful?
    5 out of 5 stars
    24 March, 2026
    originally posted on influenster.com
    Image

    Great on your skin

    [This review was collected as part of a promotion.] I love the way it feels smooth on my face and more firm. It absorbs quite well into my skin and doesn’t leave any sticky or greasy feeling, just nothing but soft and smooth. I most definitely recommend this product.
    EvaO
    Did you find this review helpful?
    5 out of 5 stars
    24 March, 2026
    originally posted on cosrx
    Image

    Completely transformed my skin. Smaller

    [This review was collected as part of a promotion.] Completely transformed my skin. Smaller pores. Smoother texture.
    Sarah R.
    Did you find this review helpful?
    5 out of 5 stars
    23 March, 2026
    originally posted on cosrx
    Image

    I love this serum! It

    [This review was collected as part of a promotion.] I love this serum! It is clearly helping to heal my acne. I feel like my skin overall has improved in all 6 of the categories since I started using it. I also like how light weitght it is. It's nice having a serum that doesn't feel sticky or heavy. It also wears very well under makeup.
    Alyssa G.
    Did you find this review helpful?
    5 out of 5 stars
    23 March, 2026
    originally posted on influenster.com
    Image

    Is it great

    [This review was collected as part of a promotion.] It’s suitable for dry skin. It helps with texture and feels really great on the skin. The whole experience of using this skin booster is a great experience. Highly recommended.
    SH64
    Did you find this review helpful?
    5 out of 5 stars
    23 March, 2026
    originally posted on influenster.com
    Image

    Amazinggg!!!

    [This review was collected as part of a promotion.] This products made my skin smooth, soft, and firm with zero irritation. The packaging is simple and cute!! Absolutely love this product and will be buying again! Would recommend 100%
    BriannaM
    Did you find this review helpful?
    3 out of 5 stars
    22 March, 2026
    originally posted on influenster.com
    Image

    Positive results.

    [This review was collected as part of a promotion.] Overall the bottle is sleek and doesn't take up a ton of room in my travel bags or bathroom caddy. The small amount of product actually needed per use means this will last you for quite a while. Honestly, my husband usurped this serum and loves it. After application it feels tacky, but dries smooth leaving a natural skin/glow. My skin (and my husband's) looked visually better with a bit of a tightening effect, which you do feel. I would recommend this for people that want to feel the effects of a product and not just see them. For me the tightness was a little off putting despite the other positive effects.
    AmandaC
    Did you find this review helpful?

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