What Is PDRN in Skincare? The Salmon DNA Ingredient Explained

PDRN stands for polydeoxyribonucleotide. It is a chain of DNA fragments, most commonly sourced from salmon, that Korean skincare has turned into one of the most talked-about ingredients of the past two years. In topical skincare, PDRN is used for deep hydration and to support a smoother, plumper look in the skin.

Where PDRN comes from

PDRN is purified from salmon DNA, which is structurally very similar to human DNA and well tolerated by skin. The ingredient first built its reputation in Korean dermatology clinics, where injectable PDRN treatments (often known by the clinic brand Rejuran) became a popular skin booster. Topical PDRN products like serums and creams came later, bringing the ingredient into everyday routines at a fraction of the clinic price.

What topical PDRN actually does

It is worth being clear about the difference between the clinic version and the cosmetic version. The strong research on PDRN, including its use in wound healing and skin regeneration, comes from injectable forms. A serum cannot replicate an injection, and any brand that claims otherwise is overselling.

What a well-formulated topical PDRN product is good at: drawing and holding moisture in the skin, supporting a calm and comfortable skin barrier, and improving the look of plumpness and glow over consistent use. Most PDRN formulas, including Medicube's, pair the ingredient with peptides, hydrolysed collagen, or hyaluronic acid so the hydration works at several levels at once.

PDRN at a glance

	PDRN (topical)
What it is	DNA fragments, usually salmon-derived
Main benefits	Hydration, plumper look, supports a calm skin barrier
Irritation risk	Very low; no adjustment period
Best for	Dehydrated, dull, or stressed skin; routines built around glow
Pairs well with	Peptides, collagen, hyaluronic acid, niacinamide, retinol
Vegan	No (animal-derived)

Shop the Medicube PDRN range

Who PDRN suits

PDRN is one of the gentlest actives in Korean skincare. It has essentially no adjustment period, which makes it a good pick if your skin reacts badly to stronger ingredients, or if you want a hydration step that does more than a basic hyaluronic acid serum. It layers comfortably with almost everything, including retinol. If you are weighing those two up, we have a separate guide comparing PDRN vs retinol.

How to use it

Apply a PDRN serum after cleansing and toning, before your moisturiser, morning or night. The best-known topical PDRN product is the Medicube PDRN Pink Peptide Serum, which uses 10,000 ppm salmon-derived PDRN alongside five peptides and hydrolysed collagen. Medicube builds a full routine around the ingredient, and we cover the order of steps in our Medicube PDRN routine guide. You can browse the whole range on our Medicube collection page.

Questions about PDRN or anything else in the range? Email us at contact@dlux-essentials.com and we will point you in the right direction.