PDRN (salmon DNA)

PDRN stands for polydeoxyribonucleotide, a mixture of DNA fragments most often sourced from salmon or trout milt (sperm) that is purified into short nucleotide chains. It became one of Korea's most talked-about ingredients in 2025 to 2026, largely on the back of its use in aesthetic clinics. Honesty matters here: the strongest PDRN evidence comes from injectable and medical settings, where it is studied for wound healing and tissue repair, partly through activation of adenosine A2A receptors. For topical cosmetics the evidence is genuinely emerging. PDRN is a large molecule with real questions about how much penetrates intact skin, and the well-supported topical benefits are hydration, comfort and a temporary glow rather than the deeper regeneration that marketing implies. Treat it as a promising but early ingredient and judge products by the whole formula. It is best for people focused on dullness, dehydration and early aging who want a well-formulated hydrating serum, and who understand they are buying a trend ingredient with modest topical proof. Layering is uncomplicated. PDRN serums sit in the hydrating steps and pair well with hyaluronic acid, panthenol, Centella and peptides. There are no established conflicts, so it can accompany most routines. On safety, purified PDRN is generally well tolerated and often fragrance-free. The main caution is fish or seafood allergy, given the marine origin. It is not a known Malassezia feeder. No specific pregnancy data exist for topical PDRN, so the responsible position is to avoid unproven trend actives if you prefer caution and to confirm with your clinician.