This smoothing blend of ingredients provides deep, long-lasting hydration on three levels: on the surface, deeper in the skin and by increasing the skin's own hyaluronic acid production. 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 PCA SKIN 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. | PCA SKIN Hyaluronic Acid Boosting Serum, 3 oz | Dermstore