Obagi Professional-C Serum 20% Strength: Obagi Professional-C Serums neutralize free radicals at all layers of the skin, before they damage skin cells and accelerate aging. Obagi Professional C-Serum Offers: Superior delivery system, resulting in greater penetration to all layers of the skin Maximum daily antioxidant protection Greater stability than competitive C products Low side effect profile Benefits: Helps maintain normal cellular turnover Builds collagen L-Ascorbic acid is essential for cross-linking collagen molecules Lightens and brightens skin Reduces inflammation Decreases transepidermal water loss Obagi Medical Professional-C Microdermabrasion Polish and Mask 2. 8oz: Helps to unveil dramatically brighter, smoother, more youthful-looking skin, with a powerful infusion of 30% L-ascorbic acid (Vitamin C) and ultra-fine crystals for exfoliation. 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 Obagi Medical 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. | Obagi Medical Skin Clarifying Regimen Duo | Dermstore