Includes C-ESTA Serum and Antioxidant Daily Face Protectant SPF33: Great for skin types normal. dry. oily. Acne prone and sensitive. C-ESTA Serum is a powerful antioxidant cocktail. featuring Vitamin C and DMAE. shown to reduce the appearance of fine lines and wrinkles and uneven skin texture. Preferred by subjects in a blinded split-face study vs. a leading Vitamin C solution. C-ESTA Serum is the preferred Vitamin C and antioxidant solution for younger. healthier looking skin.