Professional C-Serum 10% - 1oz

What you are looking at is Professional C-Serum 10% - 1oz by Obagi, a skincare product. Order matters in a routine: thinner, water-based textures go on before richer creams and oils, or the layers underneath never land. Patch test on the inner arm or along the jaw first, especially if you are already using retinoids, acids or vitamin C. Whether it is discounted this week says more about the shop's stock than about the product. Keep the lid closed and the pack out of direct sun — light and air degrade most actives faster than time does. The best deal and the cheapest sticker price are not always the same listing once delivery is counted.