Easily firm, lift and smooth your skin with Yon-Ka's Advanced Optimizer Duo. Harnessing the power of plant peptides and hyaluronic acid, this kit boosts collagen production while keeping your skin deeply hydrated. Yon-ka's Advanced Optimizer Duo includes:Advanced Optimzer Serum (1. 01 fl. oz. ): a firming facial serum that reactives the skin components responsible for firmnessAdvanced Optimzer Creme (1. 35 oz. ): a firming face cream for smoother, redefined facial contoursKey Ingredients:Hibiscus Peptides: stimulate collagenLupine Peptides: protect collagenSoy Peptides: smooth and restructureHyaluronic Acid: hydratesShea Butter: repairs and protectsKey Benefits:LiftsFirmsRegeneratesRevitalizesHydrates. Dermstore has partnered with Flex to allow you to use your Health Savings Account (HSA) or Flexible Spending Account (FSA). This means you can now use your HSA or FSA debit card to buy Yon-Ka Paris Skincare products with pre-tax dollars, resulting in net savings of 30-40%, depending on your tax bracket. Eligible for HSA/FSA with a letter of medical necessity at checkout. From dermatologist-recommended treatments to solutions for chronic skin conditions like acne, eczema, and rosacea, these products are both effective and eligible. | Yon-Ka Paris Skincare Advanced Optimizer Duo (2 piece) | Dermstore