This serum, formulated with a high concentration of Vitamin C, supports skin health. Brand: Obagi Product Name: Vitamin C Serum 25 NEO Volume: 12ml Features: High-concentration Vitamin C serum Purchase Date: September 2025 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 Utilizes high-penetration technology. Delivers the Vitamin C serum thoroughly from the skin surface to every corner of the stratum corneum. Ultra-Stable Formulated with "pure Vitamin C," which works quickly within the skin (stratum corneum). Successfully stabilized the easily-decomposed "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 toner, take an appropriate amount (4-5 drops) in your palm and apply it to your face. This is a new, unopened item. Please refrain from purchasing if you are sensitive to such matters or seek perfection, as it is stored at a private residence. ■Please be sure to read the profile. ■Returns are generally not accepted. Please refrain from significant price reductions. ■Instant purchase OK Even during comment exchanges, we will prioritize the person who presses the purchase button first, so please understand. ■We will ship with simple packaging. Depending on the product, it may be compacted. ■Responses and shipping may be delayed depending on the day. ■We are not responsible for any delivery issues (troubles, etc.) that may arise for any reason. ■Please feel free to ask if you have any questions. Please understand that this is a private sale, and purchase with your understanding. Thank you for reading this long.