After your formulation is prescribed, it is sent to a licensed doctor of pharmacy who reviews the ingredients and confirms that there are not any cross-allergies or interactions. Your serum-moisturizer is then made to order in a US FDA 503(b) certified pharmacy. Your active ingredients are mixed with your moisturizer. We do not need to add any preservatives because you are going to use it within a few weeks. Just like fresh produce, your product expires and we will tell you this date. When complete, your formula will go into a luxurious, medical-grade bottle with an antioxidant preserving chamber before being shipped to your door. The result is completely personalized skincare that delivers real, visible results.