La Roche-Posays 10% Pure Niacinamide Serum is an anti-aging serum that clarifies skin discoloration and rebalances the look of uneven skin tone with visible results starting in one week. Here are some details about the product:

Positive:

• Clarifies discolorations and dark spots
• Rebalances the appearance of uneven skin tone
• Triple benefit dark spot reduction-- reduces size, shape, & fades color of dark spots
• 35% visible reduction in discolorations with 8 weeks of use
• Powerful, visibly lasting dark spot reduction—continues to fade dark spots 3 weeks after use
• Oil-free
• Hypoallergenic
• Dermatologist Tested for Safety
• Non-comedogenic

Negative: There are no negative aspects of the product mentioned in the search results.

Ingredients or materials:

• 10% Pure Niacinamide: helps visibly fade skin discolorations when used at high concentrations
• Phenylethyl Resorcinol: addresses visible skin discolorations

Overall, the product has received positive reviews from customers who appreciate its softness, greasiness, and lightness. It is also praised for making the skin extremely soft, glowy, and youthful. The product is scented and contains 10% niacinamide as its main ingredient, which helps reduce the look of dark spots, discolorations, and uneven skin tone.