Perricone MD Vitamin C Ester Brightening Serum Face 59mL Regular The Perricone MD Vitamin C Ester Brightening Serum is a 59mL face serum formulated with Vitamin C Ester as its active ingredient. Its main purpose is to brighten the skin, providing a solution for those looking to achieve a more even and radiant complexion. This product from Perricone MD is designed specifically for the face, offering a concentrated formulation to address skin concerns and improve overall skin health and beauty.