It takes several weeks to months for niacinamide to visibly reduce dark spots.
Niacinamide, a form of vitamin B3, works by inhibiting the transfer of melanin, the pigment responsible for skin color, within the skin. This slows down the production of new dark spots and helps fade existing ones.
The time it takes to see results depends on several factors:
* **The severity of the dark spots:** Deeper, more pigmented spots will take longer to fade.
* **The concentration of niacinamide:** Higher concentrations, typically 5% or 10%, are generally more effective.
* **Consistency of use:** Applying niacinamide regularly is essential for achieving noticeable results.
* **Other skincare practices:** Combining niacinamide with other treatments, such as chemical peels or laser therapy, can accelerate the process.
While niacinamide can help reduce the appearance of dark spots, it's important to note that it won't completely eliminate them. For optimal results, it's crucial to protect your skin from sun damage, which can cause hyperpigmentation.