That’s *La Roche-Posay Pure Vitamin C10 Serum*, 30 mL/1 fl oz dropper bottle. *Short summary:* - *Use*: Anti-wrinkle, antioxidant, radiance-renewing serum for face and neck - *Key actives*: 10% Pure Vitamin C (L-Ascorbic Acid) + Salicylic Acid + Neurosensine + Thermal Spring Water - *Claim*: Targets wrinkles, lack of luminosity, and irregular texture. Suitable for sensitive skin - *Texture*: Lightweight, slightly viscous serum with a mild oily feel. Absorbs fast without stickiness - *Best for*: Dull, sensitive, or aging skin that wants brightening but can’t tolerate 15-20% vitamin C This uses pure L-ascorbic acid at 10%, which is the gold standard form of vitamin C. It’s more potent than the vitamin C derivatives in the Advanced Clinicals serums, but 10% is still a gentle entry point. The low pH needed for L-ascorbic acid is buffered by Neurosensine and Thermal Spring Water to reduce irritation. The small amount of salicylic acid gives mild exfoliation to help with texture and penetration. *How to use*: AM is ideal for antioxidant protection under your Anthelios UVMune 400 SPF. Apply 3-4 drops to clean, dry skin. Expect a slight warm feeling on first use. It has a natural vitamin C scent, no added fragrance. *Important*: Don’t use with niacinamide, retinol, or AHAs/BHA in the same routine if you’re sensitive. With your current lineup, use this in the AM, and save The Ordinary Niacinamide 15%, COSRX Retinol 0.5, and Paula’s Choice BHA for PM on alternate nights. The amber bottle protects from light, but store it away from heat. If it turns dark orange or brown, it’s oxidized. Use it within 3 months of opening. This is a step up from the Advanced Clinicals Vitamin C Serum in potency. If you want stronger brightening and real L-ascorbic acid benefits, this is it.