BEAUTYSTAT Universal C Skin Refiner Serum 1oz/30mL FULL SIZE; SEALED BOX Retails for $85. Brand NEW BOX. BeautyStat Universal C Skin Refiner Vitamin C Brightening Serum is the world's first 20% vitamin C serum containing stabilized L-ascorbic acid (the purest form of vitamin C) through a patented encapsulated system promising maximum potency delivering the fastest results.