What does Discoloration Defense do?Discoloration Defense is a twice-daily serum for dark spots that will reduce the appearance of certain types of skin discoloration caused by the sun’s UV rays and acne. What color should Discoloration Defense be when first opened?Upon breaking the plastic and opening, the color of Discoloration Defense can vary, ranging from a light brown to amber color. Due to the concentration of Kojic acid in this formula, a shift in color is expected but the formula remains effective. How do you use Discoloration Defense?Discoloration Defense should be used by applying 3-5 drops to the face twice daily. Morning applications of this serum for dark spots should be applied after SkinCeuticals vitamin C serum and before SkinCeuticals broad spectrum sunscreen. Do not apply to broken or irritated skin. Sun exposure should also be limited while using this product. How long does it take for Discoloration Defense to work?Discoloration Defense dark spot corrector is clinically shown to reduce post-blemish marks by 34% after 12 weeks of twice-daily application.