The closest dose of retinol you can get without a prescription, the Retinal + Niacinamide Youth Serum curbs the common fear of the potent ingredient with its gentle efficacy. TYPE OF BREAKOUT: A breakout caused from skin purging can be, whiteheads, blackheads, cysts, dryness or flaking skin. Is your skin purging or is it breaking out? In this tutorial, find out how to tell the difference, what causes purging, and what you can do to get clear again.