While many skin care products claim to offer astounding results, the best proof is often in the formula. When evaluating which beauty products have the potential for the best desired results, the ingredients can offer clues. For over 15 years, SkinCeuticals has been researching which ingredients pack the most punch for skin care. In their careful research, they have determined the four antioxidants that penetrate the skin most effectively, which are now used in Skinceutical products. These four antioxidants are Vitamin C (L-ascorbic acid), Vitamin E (Alpha-tocopherol), ferulic acid and phloretin. These four antioxidants help combat the most noticeable signs of aging, which are fine lines, crows feet, loss of elasticity, and hyper pigmentation. With their scientifically-proven formula compiled into potent skin care products, SkinCeuticals offers exceptional results for healthy, youthful skin.