COSRX

COSRX 5% PDRN Collagen Vitalizing Serum.

Serums

About this product

A lightweight serum infused with 5% PDRN, collagen, niacinamide, and centella asiatica, designed to support skin vitality and hydration.

Full ingredients

Water, Butylene Glycol, Glycerin, Niacinamide, Pentylene Glycol, 2,3-Butanediol, 1,2-Hexanediol, Betaine, Diethoxyethyl Succinate, Sodium Dna, Carbomer, Arginine, Panthenol, Ethylhexylglycerin, Adenosine, Hydrolyzed Corn Starch, Disodium EDTA, Allantoin, Sucrose, Lactobacillus Ferment, Pantothenic Acid, Alpha-Arbutin, Hydrolyzed Collagen, Centella Asiatica Extract, Propanediol, Tocopherol, Sodium Phytate, Sodium Hyaluronate, Hydrolyzed Dna, Caprylyl Glycol, Hydroxypropyltrimonium Hyaluronate, Acetyl Hexapeptide-8, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Hyaluronic Acid, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Potassium Hyaluronate

Guru Score

72%

Mixed

Early verdict · Few reviews so far

What the gurus are saying

Experts split on whether the ingredient lineup delivers. James Welsh calls it a comprehensive one-and-done serum with everything included, though his take was sponsored. No BS Beauty found it rich in actives (PDRN, collagen, niacinamide, sodium hyaluronate, alpha arbutin, centella, and peptides) with a pleasant liquidy-gel texture and no stickiness, but notes it's not hydrating enough to stand alone, so it works best layered into a routine with other moisturizing products. The PDRN ingredient itself has believers, though not universal enthusiasm.

Synthesized from 2 expert reviews · most recent take August 2026

What they liked

Lightweight, silky texture layers smoothly
Non-sticky feel, no fragrance
Builds to dewy finish with multiple layers

What they flagged

Not hydrating enough on its own

Best for

Mature skin

Type

SerumsDrops & dropper

Key actives

Niacinamide Hyaluronic acidVitamin EPeptides

Formula notes

Fragrance-freeNo drying alcohol

Where to buy

Ulta → Amazon → Google → iHerb →

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What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored

No BS Beauty

89k subs

~Nay

"It's very liquidy, more of a liquidy gel texture, and it has no scent. It's got niacinamide, PDRN, collagen, several types of sodium hyaluronate, alpha arbutin, centella, lactobacillus ferment, and a peptide. It feels nice and doesn't feel sticky at all, but it's not super hydrating, so maybe it works better in a routine with a lot of other hydrating products. The serum so far, I'm not impressed overall."

All 2 takes from No BS Beauty

New 🆕 Cosrx, Klairs, The Ordinary, Paula's Choice Bubble, ELF Peach & Lily - First Impressions

"I'm totally not huge on the PDRN thing, but some people swear by it."

New Cosrx, I'm From, Peach Slices, Wishtrend Skincare Routine & First Impressions Trial

James Welsh

1.58M subs

~Yay

"It's got everything in it. This is a crazy serum in my mind. [...] It's your one and done serum. It kind of targets so many different skin care concerns, ones that you wouldn't usually put together like irritated skin with brightening. [...] It's lightweight. It's silky. It's very refreshing and layers so nice without peeling. [...] After two to like three layers, your skin feels juicy. But five layers gives you that full on dewy like glass skin finish if that's what you're into."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Niacinamide

Niacinamide has evidence behind it for redness, uneven tone and supporting the skin barrier, and it is usually well tolerated even by skin that reacts to most things.

Source: DermNet

Humectants and emollients

Ingredients like these draw water into the surface layers and slow how fast it leaves. The evidence is for comfort, softness and hydration rather than for changing the structure of the skin.

Source: DermNet

Peptides

Peptides are short protein fragments meant to signal repair. The evidence for them is thinner than for retinoids or vitamin C, and it varies a lot by the specific peptide, so the category is more promising than proven.

Source: NIH, National Library of Medicine

Frequently asked.

What is COSRX 5% PDRN Collagen Vitalizing Serum?

A lightweight serum infused with 5% PDRN, collagen, niacinamide, and centella asiatica, designed to support skin vitality and hydration.

Is COSRX 5% PDRN Collagen Vitalizing Serum worth it?

The gurus mostly approve it, but with enough reservations to keep it in the middle at a Guru Score of 72%.

What is COSRX 5% PDRN Collagen Vitalizing Serum's Guru Score?

COSRX 5% PDRN Collagen Vitalizing Serum holds a Guru Score of 72%. That is our read on how warmly the experts talk about it, based on the verdicts of 2 expert reviewers we have collected.