Timeless Skin Careu2019s 20% Vitamin C Serum + Vitamin E + Ferulic Acid illuminates the complexion, making it brighter and more even-toned for up to 72 hours from the first application. Featuring an ultra-high concentration of Vitamin C, this quick-absorbing serum tames oxidation and fixes hyperpigmentation and discolorations for a healthy, radiant look.Boosted with vitamin E and ferulic acid, this formula promotes collagen production and protects against environmental stressors to minimize signs of aging. As well as brightening, evening, and protecting the skin, this serum also creates a firmer and more elastic complexion.