Kiehl’s Clearly Corrective Dark Spot Solution is a powerful, fast-acting serum designed to visibly diminish dark spots, hyperpigmentation, and post-acne marks. Formulated with a potent, stable form of Vitamin C known as “Activated C,” this serum penetrates the skin’s surface quickly to address deep-seated discoloration while preventing the formation of new spots. The dermatologist-tested formula is lightweight and transparent, helping to boost overall skin radiance and improve clarity. Suitable for all skin types and tones, it works consistently to reveal a more even, uniform, and luminous complexion without the use of harsh bleaching agents.