La Roche-Posay Pure Vitamin C10 Serum is a potent anti-aging skincare solution containing 10% pure vitamin C, salicylic acid, and neurosensine. This lightweight serum helps reduce wrinkles, brighten skin tone, and protect against environmental damage while being suitable for sensitive skin. The serum comes in a 30ml amber glass bottle with a dropper applicator to protect the vitamin C from light degradation. For best results, apply 3-4 drops in the morning to cleansed face and neck, avoiding the eye area. Use in conjunction with sunscreen as vitamin C can increase sun sensitivity. The formula may naturally darken over time due to vitamin C oxidation but remains effective. Store in a cool, dark place to maintain potency.