The unique clear formula is enriched with Activated Vitamin-C, Peony Extract and White Birch Extract. The results are clear: an effective year-round solution for more even looking skin tone and overall clarity. Kiehl's Clearly Corrective Dark Spot Solution is part of the complete range of dermatologist skin solutions from Kiehl's. Clearly Corrective Dark Spot Solution is the first Kiehl's serum that promotes youthful clarity while helping to reduce the appearance of dark spots, discolourations and hyperpigmentation. See visible results in just 8 weeks! - 87% of women clinically demonstrated more even skin tone. - 89% of women clinically demonstrated a reduction in dark spot intensity.