Welcome to Skimm Tested, a series where we put viral products to the test and give you our honest, unfiltered reviews. What I Tested… Medik8’s Exo-PDRN Prismatic+ ($96, Medik8) — a next-gen rejuvenating serum powered by advanced skincare technology. It’s designed to deliver a full-spectrum of results to visibly improve skin health, tone, luminosity, firmness, and volume, while reducing the appearance of wrinkles. PS: Wondering what “skin rejuvenation” is?