Contains Vitamin C, an antioxidant that evens skin tone and helps build collagen. Also contains vitamin E and Ferulic Acid, used to extend the life and effectiveness of vitamin C.Paraben free, cruelty free, fragrance free, and no color dye added. Made in USA.Apply 2-3 drops to fingertips and smooth evenly onto cleansed skin morning and night.When freshly manufactured, the 20% Vitamin C + E Ferulic Acid serum is cloudy and thick in appearance, with slight yellowing. As the serum begins to age it starts to clear up, then begins with hints of yellowing, which is normal due to the Ferulic Acid, not the vitamin C. As long as it is in a yellow state, it is okay to use.Refrigeration is recommended, as mentioned on the box, to extend the shelf life of the serum and slow down the process of oxidation.