Thank you for viewing! This serum contains a high concentration of Vitamin C to support healthy skin. Brand: Obagi Product Name: Vitamin C Serum Model Name: 25 NEO Volume: 12ml Features: High-concentration Vitamin C serum Purchase Date: August 2025 New, unopened The C Serum series is dedicated to high concentrations of pure Vitamin C. Among them, Obagi C25 Serum Neo achieves the highest concentration of pure Vitamin C. High Penetration Adopts high penetration technology. Delivers Vitamin C serum thoroughly from the skin surface to every corner of the stratum corneum. Ultra-Stable Contains "pure Vitamin C," which works quickly within the skin (stratum corneum). Successfully stabilized the easily-degraded "pure Vitamin C" through original design. [How to Use] Recommended for use twice a day, morning and night. Vitamin C is especially effective when used before exposure to UV rays. In the morning and evening, after preparing your skin with lotion, take an appropriate amount (4-5 drops) into your palm and apply it to your face. ○ Instant purchase OK! ☆ Please refrain from purchasing if you are sensitive to items stored at home. If you have any questions, please comment!