YOU·OLOGY 7-day vitamin C treatment New Smoke free Details: Quality you can feel. Results you can C. Contains a highly concentrated 26% of vitamin C in each booster bead. YOU·OLOGY 7-day vitamin C treatment’s innovative freeze-dry technology removes the moisture from the booster beads, leaving only the potent natural ingredients for maximum results. This vitamin C serum for your face can be used in place of a daily serum during treatment