A potent brightening Vitamin C face serum, powered by pure 15% Vitamin C (L-Ascorbic Acid). Gently exfoliates the skin to Fight visible signs of oxidative stress and dark spots. 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 Neostrata 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. | NEOSTRATA 15% Vitamin C and PHA Serum, 15 ml | Dermstore