PDRN, short for polydeoxyribonucleotide, has taken over skincare in recent years. It is hard to avoid, especially in Korean skincare: serums, creams, toners, lip balms and even hair products (!). The trend has reached the point where existing products are being reformulated just to add PDRN. Which raises an obvious question: is this a real breakthrough, or has the hype got a little out of hand? What is PDRN? PDRN is a mixture of DNA fragments, commonly purified from salmon DN