COSRX The 6 Peptide Skin Booster Serum - 5.07 fl oz - Ulta Beauty
$22.00
Size5.07 fl oz
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Guests are saying
The 6 Peptide Skin Booster Serum is a lightweight and hydrating product that absorbs quickly into the skin, making it an excellent addition to any skincare routine. Guests appreciate its smooth application and the way it enhances the overall texture and glow of their skin. Many have noted improvements in hydration, reduced redness, and a more even skin tone. This serum is particularly suitable for sensitive skin, providing a gentle yet effective solution for various skin concerns.
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 26556 reviews
42% would recommend
7 recommendations
5 out of 5 stars
11 June, 2026
originally posted on cosrx
I’ve only been using this
[This review was collected as part of a promotion.] I’ve only been using this for a couple of weeks but my skin looks better slready
4 out of 5 stars
9 June, 2026
originally posted on cosrx
It's a keeper, absolutely love
[This review was collected as part of a promotion.] It's a keeper, absolutely love it
5 out of 5 stars
7 June, 2026
originally posted on cosrx
Feels slightly thicker than water,
[This review was collected as part of a promotion.] Feels slightly thicker than water, and very pleasant. Has a smooth texture.
5 out of 5 stars
6 June, 2026
originally posted on cosrx
I ran out of the
[This review was collected as part of a promotion.] 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.
5 out of 5 stars
5 June, 2026
originally posted on influenster.com

I love the glow
[This review was collected as part of a promotion.] It made me break out because it brings the fat to the first layer of the skin.It gives you a glow when you begin using it but it breaks your skin out after you use it
5 out of 5 stars
1 June, 2026
originally posted on cosrx
Love love love this serum.
[This review was collected as part of a promotion.] Love love love this serum. I use it every morning before sunscreen and at night before moisturizing. This is my second order
5 out of 5 stars
31 May, 2026
originally posted on cosrx
This feels so good on
[This review was collected as part of a promotion.] This feels so good on my face, it’s been easy for me to incorporate it morning and night and usually it’s difficult for me to be consistent with any skin care routine.
5 out of 5 stars
31 May, 2026
originally posted on cosrx
When I turned 47 my
[This review was collected as part of a promotion.] When I turned 47 my skin changed dramatically—the snail mucin line was the only thing that soothed my now ridiculously dry skin. I added the peptide boost after getting the dryness under control. I feel human again.
5 out of 5 stars
29 May, 2026
originally posted on influenster.com

if you’re going to splurge, make it be this
[This review was collected as part of a promotion.] Worth every penny for silky, glass looking skin. Been using it for years now, will always re purchase, because the difference when I don’t use this products is seen
5 out of 5 stars
24 May, 2026
originally posted on influenster.com

My skin loves this!
[This review was collected as part of a promotion.] This product is very soothing and hydrating. The application is very smooth and the serum has a great consistency that isn’t too thick. I have combination skin that could be sensitive with certain products, but I had no issues with this one.
5 out of 5 stars
24 May, 2026
originally posted on cosrx
I love this product on
[This review was collected as part of a promotion.] I love this product on my face, neck & chest. My skin looks so much healthier, less redness.
5 out of 5 stars
23 May, 2026
originally posted on cosrx
This is a perfect serum
[This review was collected as part of a promotion.] 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.
5 out of 5 stars
20 May, 2026
originally posted on cosrx
Love this serum, makes skin
[This review was collected as part of a promotion.] Love this serum, makes skin feel so soft, easy application!
4 out of 5 stars
20 May, 2026
originally posted on cosrx
Just got this use in
[This review was collected as part of a promotion.] Just got this use in the am. Not sticky and barely noticeable. Use in the am before makeup. Will need longer to see if it’s making a difference. I do wish I had cosRX as a teen it would have helped.
5 out of 5 stars
18 May, 2026
originally posted on influenster.com

Very nice!
[This review was collected as part of a promotion.] Loved this serum! Not a fan that’s it’s from a snail though but I do love how it made my skin feel afterwards. It left my skin very glowy and moisturized!
5 out of 5 stars
17 May, 2026
originally posted on cosrx
Love this product! Goes on
[This review was collected as part of a promotion.] Love this product! Goes on so nice and brightens my skin!
3 out of 5 stars
17 May, 2026
originally posted on influenster.com

More like a booster for your other serums
[This review was collected as part of a promotion.] It's more of a feel good product. Didn't see any change in my face. I used them as a toner before using my other products. Consistency is more like thick water. Packaging is fine, easy to use pump. I have normal to dry skin.
5 out of 5 stars
17 May, 2026
originally posted on cosrx
Amazing! I have been using
[This review was collected as part of a promotion.] Amazing! I have been using this in combination with the Snail 92 all in one cream. I live in a dry climate so it helps keep my skin moisturized without feeling greasy.
5 out of 5 stars
12 May, 2026
originally posted on cosrx
Almost seeing results
[This review was collected as part of a promotion.] The booster serums is not working at this moment it’s only bend one week
5 out of 5 stars
8 May, 2026
originally posted on influenster.com

Very gentle on my skin
[This review was collected as part of a promotion.] Perfect serum love it a lot. It helps with irritation and moisturizes your skin sooo much. I have been using it every day and can’t imagine my skin routine without it