The 6 Peptide Skin Booster Serum
Summary of Reviews
COSRX The 6 Peptide Skin Booster Serum is a watery, toner-like serum that several creators, including professional makeup artist Lisa Eldridge, praise for its hydrating, lightweight texture that layers well under other products. It's noted as gentle enough for sensitive skin by amyswan, and Nina Ubhi highlights its peptide, hyaluronic acid, and niacinamide blend for plumping and smoothing. The blue tint comes naturally from the peptides, and it's easy to pump onto the face, making it a simple intro to peptides.
Full Reviews
Positive
- “I love this guy”
- “The pump packaging really does the trick for me”12:28–12:37
- “This one is quite watery and lightweight”12:34–12:40
- “It is the consistency of a toner”12:37–12:43
- “I love that I can just pump it straight onto my face”12:37–12:46
- “It's incredible to use to prep your skin before the rest of your skincare routine”12:46–12:50
- “It kind of started an obsession with skin boosters”12:50–12:56
- “I keep coming back to it again and again”13:12–13:17
- Source: 150+ Skincare Empties in 1 Year: What I Actually Bought Again - Jun 13, 2026
- “It's actually blue, not from artificial dyes, but because that is the color of the actual peptide in this”14:22–14:29
- “This is going to help plump, firm, and smooth your skin, as well as add glowy hydration”
- “This is kind of like one of those all-in-one serums. It does a little bit of everything”14:37–14:40
- “It's super lightweight”14:40–14:43
- “I do think it's lightweight enough to wear under your makeup”14:45–14:51
- “This is my favorite serum from COSRX”14:55–14:59
- “The blue peptide serum from COSRX is epic”15:09–15:14
- Source: Amazon Prime Day Haul: Over 40 Best Deals - Jun 23, 2026
- “I really like this because it's like nice feeling watery serum that I like to put on before my other serums and moisturizers”5:27–5:35
- “It kind of preps my skin for the other skin care products”5:35–5:40
- “This never irritates my skin. I think it would be good for sensitive skin”6:08–6:13
- “It feels really nice, goes on really nice as a watery serum, if you will”6:11–6:18
- “I will always keep this on hand, and I already have a new one on my skin care table”6:16–6:25
- Source: Skincare empties: which ones I repurchased - Jun 11, 2026
- “I really personally love this because of the texture of it”10:47–10:56
- “It is like a very very very thin serum essency water that just feels so hydrating on your skin”10:52–10:59
- “For me if I use this before I use a cream or before I use my SPF then I feel like it's almost enough for me”11:08–11:12
- “I really like this just more for the hydrating effects”11:46–11:50
- Source: Korean skincare viral products deep dive - May 14, 2026
- “You know I love this. I've been using it for a while”9:11–9:17
- “Great for fine lines, dull skin”9:17–9:21
- “It's got six peptides in there, hyaluronic acid, niacinamide”9:19–9:26
- “A very good product without all the fuss”9:24–9:28
- “You've got better hydration, smoother skin, more plump skin”9:26–9:31
- “A great serum I would say cuz it's not oily on the skin. It does do its job without leaving any particular type of residue”9:33–9:38
- Source: Korean skincare and beauty products I recommend for over 40s - Jul 17, 2026
- “The last peptide serum is from COSRX. It's their six peptide booster”13:52–13:58
- “It's easy to work into your skincare routine if you just want to try peptides for the first time. See what you think of them”14:08–14:14
- “This is, I think, a decent product to go with”14:14–14:19
- Source: Budget friendly anti-aging skincare that actually works - Jun 12, 2026
- “The six peptide booster is the COSRX product that I really like a lot”8:34–8:42
- Source: Amazon Big Spring Sale Top Picks - Mar 27, 2026
- “The COSRX 6 peptide booster serum, which also has copper tripeptide 1 on the ingredients list, is clear, too”3:48–4:00
- Source: Dermatologist Compares Dollar Tree vs High-End Skincare - Jan 24, 2026
Mixed / Negative
No negative reviews yet — creators have only had good things to say.
What creators say
- Consensus
- 4.5 / 5 from 6 creator reviewsGrailPeople ratings based on creator reviews.
- Good for
- Fine lines & firmness (2)
- Features
- Lightweight (3) · Hydrating (3) · Easy to use (2) · Plumping (2) · Under makeup (3)
Product details
Details
- Type
- serum
- Finish
- —
- Shade
- —
- Key ingredients
- 6 multi-peptides, Hyaluronic Acid, N-Acetylglucosamine, Allantoin, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, sh-Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68
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