Paula's Choice 25% Vitamin C + Glutathione Clinical Serum. Brand new, fresh product, sealed. 1 fl oz (Full size) Retails at $65 This clinical-level serum features highly stable 25% vitamin C to visibly improve uneven tone, radiance, elasticity & firmness without irritation. Potent 25% vitamin C targets stubborn discoloration & sun damage Glutathione minimizes irritation & boosts skin’s antioxidant supply GAP technology reduces oxidative stress & targets discoloration Lightly hydrating serum for all skin types