What it is: DermaQuest Advanced C Infusion Moisturiser is a creamy, multifunctional serum that brightens, tightens, and repairs better than ever before while protecting against UV and free-radical damage. What it does: With daily use, DermaQuest Advanced C Infusion Moisturiser seeks out signs of photoaging and damage, bringing glowing radiance to the foreground and building a stronger skin barrier for your brightest, firmest, most resilient skin yet.