COSRX
5 PDRN Collagen Intense Vitalizing Serum
COSRX's PDRN collagen serum, worn after toner and before moisturizer, morning and evening, for skin that looks tired and flat.
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- Duties prepaid
- Suited to
- SensitiveCompromised barrierUneven toneDull
- Helps with
- Barrier weaknessEarly environmental damageUneven tone and dullnessExcess oil
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- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
How it works
A serum is the step where one idea gets concentrated, and the idea here is the PDRN naming COSRX uses across this line, which on the list is sodium DNA. It carries niacinamide and panthenol, with hydrolyzed collagen and adenosine behind them. It goes on after toner and before moisturizer, morning and evening, pressed in rather than rubbed around. Skin that looks flat and tired rather than dry or congested is the case it fits, and the change it works on is gradual. Twice a day, every day, and it layers under anything else already in the routine.
Key benefits
- 100 ml bottle, the size the Korean market sells
- Goes on after toner and before cream, AM or PM
- Sourced as the original Korean-market version
Key actives
Butylene Glycol
a multifunctional glycol that carries moisture and helps preserve the formula
Niacinamide
a brightening, sebum-regulating amide that also reinforces the skin barrier
Panthenol
a barrier-supporting provitamin that eases surface roughness
Adenosine
a wrinkle-care ingredient recognised for supporting skin's own renewal signals
COSRX 5 PDRN Collagen Intense Vitalizing Serum
What does PDRN mean for this serum's actual ingredient list?
PDRN is not itself an INCI name; on this bottle it appears as Sodium DNA, tenth on the list, and again further down as Hydrolyzed DNA. Niacinamide leads the active portion of the formula in sixth place, with hydrolyzed collagen and alpha-arbutin following in the middle of the list. Reading the actual INCI names rather than the marketing term is the accurate way to know what this serum contains.
Is this serum suitable for sensitive skin?
No fragrance, essential oil, denatured alcohol, silicone, paraben, sulfate surfactant, mineral oil, or added colourant appear anywhere on this ingredient list. Panthenol, allantoin, and centella asiatica extract sit in the middle of the list as calming support alongside the DNA-derived and collagen ingredients. Anyone with reactive skin should still patch test given the acetyl hexapeptide-8 and lactobacillus ferment further down the list, since a new active is worth introducing slowly regardless of the overall gentle formulation.
How long before this vitalizing serum shows a difference?
Niacinamide, the DNA-derived ingredients, and hydrolyzed collagen all work as part of a sustained routine rather than delivering a change after one application. Adenosine and the eight hyaluronate forms further down the list support surface hydration in the meantime while the other actives build with repeated use. Most people apply this daily for several weeks before assessing whether skin texture and tone have shifted, since a single night will not show a dramatic result.
Can this serum be layered with a separate hyaluronic acid moisturizer?
Yes, this serum already carries eight separate hyaluronate forms of its own, so a hyaluronic acid moisturizer applied afterward layers naturally rather than duplicating an ingredient that would cause any conflict. Niacinamide and alpha-arbutin sit earlier in the list and are commonly used alongside a standard moisturizing routine. As with any new serum, introduce it before your usual moisturizer and watch how skin responds over the first few uses.
How can I confirm this bottle is the authentic Korean-market formula?
This product's own barcode, 8800311121423, is a genuine, checkable EAN for this exact serum, so confirming that number matches your box is a first-line check. Beyond the barcode, COSRX runs its own authentication system: the batch number and expiration date printed on your unit are entered on the verification page at cosrx.com. Reading both the barcode and the batch code directly off your packaging, rather than trusting a listing's description, is the reliable way to confirm authenticity.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
Payment and security
We accept
How to use
- Use the 5 PDRN Collagen Intense Vitalizing Serum after toner and before moisturizer, morning and evening.
- Three or four drops covers the face and neck. Press it in with flat palms rather than rubbing it around.
- Toner first, this second, then moisturizer, and sunscreen last in the morning.
- Twice a day, every day. Do not stack it with a second serum doing the same job; two at once do the work of one.
Worth knowing
- Collagen here is not plant-derived, so this is not a vegan formula.
Reviews
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COSRX, Korean-market original
The serum step, worked into damp skin before moisturizer. 100 ml bottle.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about the key actives in this formula, quoted from the medical sources linked beside each.
Pantothenol is a common ingredient in skin care and hair products I recommend, particularly for people who are prone to dryness.
Taylor Bullock, MDDermatology resident, Cleveland Clinic Niacinamide helps reduce the appearance of pores in a few ways. By strengthening the skin barrier and improving elasticity, pores appear less noticeable and more even.
Ashlyn YankeAesthetician, Cleveland Clinic
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