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Common questions about fading dark spots in your late 20s
For many people with medium‑to‑deep skin tones, mild post‑acne or sun spots start to look a bit lighter after 2–3 months of consistent use of the right actives plus daily sunscreen, and may continue improving over several more months. [2]
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Troubleshooting your serum routine in city pollution
Dark spots are not changing after a few months: Check whether you are truly using sunscreen generously and regularly, including near windows and in the car. If you have been consistent with sun protection and a gentle brightening serum for 8–12 weeks but patches still look the same or are spreading, consider seeing a dermatologist instead of stacking more actives at home.