Kiehl's Clearly Corrective Dark Spot Serum — 1.0 fl oz, Activated C + Salicylic Acid for Even Tone & Radiance

Kiehl's Clearly Corrective Dark Spot Serum is a targeted facial serum formulated to reduce dark spots, even skin tone, and visibly boost radiance while plumping skin.

This lightweight corrective serum combines an activated form of vitamin C with buffered salicylic acid to address hyperpigmentation, surface discoloration, and dullness. Clinically tested across a wide range of skin tones and types, the formula is intended for spot treatment or daily use as a face serum. Results reported in clinical settings include reduced dark spot intensity, improved radiance, and softer, plumper skin within weeks of consistent use.

How quickly can I expect to see fewer dark spots and improved clarity?

Visible improvements in skin clarity and spot intensity have been observed within days to weeks, according to clinical grading in controlled studies. Individual results vary based on skin condition and frequency of use, but many users notice changes with continued application over 4–12 weeks.

• Clinically observed clarity improvements in as soon as one week.
• Reduced dark spot intensity reported by 97% of participants after 12 weeks.
• Use consistently morning and/or evening for best results.

What active ingredients make this serum effective?

The formula blends Activated C, a stabilized vitamin C derivative that helps target visible dark spots and uneven tone, with buffered salicylic acid for gentle surface exfoliation. These actives work together to fade discoloration while revealing smoother, brighter skin.

• Activated C helps reduce the appearance of hyperpigmentation and increases radiance.
• Buffered salicylic acid exfoliates dead surface cells to improve texture and tone.
• Lightweight vehicle supports daily layering under moisturizers or sunscreen.

Is this serum suitable for all skin types and tones?

The product has been tested across 47 skin tones and on all ethnicities and is formulated to be suitable for a broad range of skin types, including sensitive skin. As with any active treatment, introduce it gradually if you have very reactive or acne-prone skin and patch-test before widespread use.

• Tested on diverse skin tones for improved clarity results.
• Compatible with most skincare routines when paired with sunscreen during daytime use.
• Patch testing recommended for those with known sensitivities to acids or vitamin C derivatives.

How do I incorporate this serum into my routine for best results?

Apply a few drops to clean, dry skin once or twice daily depending on tolerance, then follow with moisturizer and SPF during the day. It can be used as a spot treatment on areas of pigment or across the entire face as a brightening serum.

• Start with once-daily application, then increase to twice daily if tolerated.
• Use sunscreen every morning—vitamin C and exfoliation increase sun sensitivity.
• Avoid mixing with highly concentrated retinoids or strong exfoliants without guidance.

Who is this for? This serum is designed for anyone concerned about age spots, post-inflammatory hyperpigmentation, dullness, or uneven tone who wants a clinically tested, lightweight corrective treatment. It appeals to users seeking a targeted brightening booster that can be used as a spot corrector or as an everyday serum, and who prioritize products proven across multiple skin tones. If you have very sensitive or reactive skin, consult a dermatologist before introducing new actives into your routine.

Ingredients

AQUA / WATER • PROPYLENE GLYCOL • GLYCERIN • ALCOHOL DENAT. • PEG/PPG/POLYBUTYLENE GLYCOL-8/5/3 GLYCERIN • HYDROXYPROPYL TETRAHYDROPYRANTRIOL • 3-O-ETHYL ASCORBIC ACID • PPG-6-DECYLTETRADECETH-30 • PHENOXYETHANOL • SALICYLIC ACID • XANTHAN GUM • HYDROXYETHYLCELLULOSE • POTASSIUM HYDROXIDE • CITRIC ACID • SODIUM CITRATE • TOCOPHERYL ACETATE • LAVANDULA ANGUSTIFOLIA OIL / LAVENDER OIL • DISODIUM EDTA • ADENOSINE • LINALOOL • BUTYLENE GLYCOL • TOCOPHEROL • CITRUS AURANTIUM TACHIBANA PEEL EXTRACT • PAEONIA SUFFRUTICOSA ROOT EXTRACT