Salmon pdrn, which stands for "polydeoxyribonucleotides," is sperm DNA most commonly derived from salmon trout or chum salmon. Whitnell, who specializes in skincare consulting, says it works by targeting a specific protein that, when stimulated, promotes wound healing. As for why salmons specifically, "the DNA of salmon is very close to that of humans, so it has a high compatibility with our own cellular functioning,"

"The extraction and purification process removes active proteins and peptides that could potentially cause immune reactions. So it is just very purely DNA and that doesn't contain (anything) that could interact with our skin in a bad way."