Recently purchased directly from Prequel. Amazing Vitamin C Serum formulated by a dermatologist. A radiance boosting vitamin C serum formulated with a potent blend of L-ascorbic acid, ferulic acid, ergothioneine, niacinamide and inulin that brightens, firms and provides ample antioxidant benefits for a glowing complexion. CLINICALLY PROVEN RESULTS After 4 weeks of once daily use: +Clinically proven to increase radiance and luminance +90% subjects agreed that their skin looked less dull After 8 weeks of once daily use: +Clinically proven to increase skin firmness +83% subjects reported improvement in skin texture Never opened - Brand new!