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The 6 Peptide Skin Booster Serum

COSRX

Current Price $25.00
One Size
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Details & care

What it is: A serum that boosts overall skin conditions, improving pores, sebum, firmness, fine lines, skin texture, skin tone and irritation.

What it does: The serum makes your skin soft and smooth and helps even out your skin tone and texture. It features a lightweight, nonsticky texture that absorbs quickly. It's perfect for those with complex skin concerns that want to improve overall skin conditions at once. It is the ideal first-step skin booster that can be paired with other products.

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

  • 5.07 oz.
  • Made in South Korea
  • Item #10403177
  • Core Product ID 333333G4NF

Shipping & returns

This item qualifies for free shipping on orders over $89. View Shipping & Returns Policy.

This item is returnable within 40 days by mail or to U.S. Nordstrom Rack and U.S. Nordstrom stores. All beauty items are only eligible for return in U.S. Nordstrom Rack or U.S. Nordstrom stores.

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Reviews

(26236)
4.6 out of 5
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Most helpful positive review

June 24, 2026
Good add to the routine
[This review was collected as part of a promotion.] 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.
Reposted from cosrx

Most helpful critical review

Jan 26, 2026
Not for me
[This review was collected as part of a promotion.] Irritated my skin and caused me to break out really bad. It just did not work for my skin. My skin is sensitive. Consistency is watery. Texture silky.
meganc724_1634
Reposted from influenster.com

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Tori m.
Reposted from cosrx
June 24, 2026
Good add to the routine
[This review was collected as part of a promotion.] 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.
TASHAUNAS
Reposted from influenster.com
June 23, 2026
: A fantastic, budget-friendly hydrating base layer for glowing skin, but it needs to be paired with a retinoid or vitamin C if you are fighting heavy scarring.
[This review was collected as part of a promotion.] The COSRX 6 Peptide Skin Booster is a phenomenal addition to any routine if your goals are hydration, overall radiance, and fading fresh marks from blemishes. It does exactly what a booster should do—it elevates the rest of your skincare routine while giving your skin a plump, glass-like finish. However, if your primary goal is fixing deep structural texture, you will need to rely on this as a base layer and pair it with a strong retinoid or professional treatments
Jessica Z.
Reposted from cosrx
June 21, 2026
This is very light and
[This review was collected as part of a promotion.] This is very light and hydrating. I really think the serum is helping plump up my skin. I like the bottle design too. :)
Chelsea F.
Reposted from cosrx
June 21, 2026
My favorite serum. You need
[This review was collected as part of a promotion.] My favorite serum. You need only a pump so it lasts forever. It is hydrating and plumping.
AlexS
Reposted from influenster.com
June 18, 2026
Nice cooling texture
[This review was collected as part of a promotion.] This made my skin feel soft, supple and gave an overall smoother appearance. It felt cooling on the skin and had a very nice texture. The bottle provided easy use.
CandiceF
Reposted from influenster.com
June 15, 2026
Meh
[This review was collected as part of a promotion.] I USED THE ENTIRE BOTTLE. Over the last year and a half I used one pump the serum daily after washing my face and before moisturizing. It’s a very watery product but added a bit of moisture to my face before my spf. It absorbed quickly wasn’t sticky and although I used it daily idk if I saw a change in my skin. I don’t think I’ll purchase it in the future
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