It starts off as a slight nagging in the back of your mind: how long have I really been using this product for? Does it feel weird on my skin or smell different? Then it evolves into mild paranoia and anxiety as you turn to check for the expiry date. We’re all familiar with the moment of panic when we brave through and glimpse at the worrisome number at the bottom of the bottle. How can the date on this product be from 6 months ago when I just bought it last month??