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Top 10 niacinamide serum benefits
Most people who use a well-formulated 2–5% niacinamide serum consistently with sunscreen start to notice brightness and texture changes in 4–8 weeks; deeper marks and fine lines usually take longer and results vary from person to person.
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Common questions about serums for oily skin and dark spots
Dark spots fade slowly, and the timeline depends on how deep the pigmentation is, your skin tone, the actives you use and, importantly, how consistent you are with sunscreen. With regular use of evidence‑based ingredients such as niacinamide, vitamin C, azelaic acid or retinoids, many people start to notice mild softening of marks after about 6–8 weeks, with more visible improvement over 3–6 months, especially for older or darker spots. [3]