O2 Niacinamide Eight Active Serum 1.7 fl oz

O2 Niacinamide Eight Active Serum 1.7 fl oz by Element Eight is a skincare product, filed under Skincare. Skincare works on a schedule of weeks rather than days — most formulas need consistent use before there is anything to see. Patch test on the inner arm or along the jaw first, especially if you are already using retinoids, acids or vitamin C. A discounted listing is only a saving if it is the same size and edition as the one beside it. Check the period-after-opening symbol on the pack; once opened, a formula is on a shorter clock than the printed expiry. The best deal and the cheapest sticker price are not always the same listing once delivery is counted.