IOPE PDRN Caffeine Shot 50ml New, Unused Purchased in June from the Qoo10 official website. ※ I am selling the full-size product because the sample size did not agree with my skin. - Brand: IOPE - Contents: 50ml - Main Ingredients: BIO-PDN 38.08% / Caffeine 20,000ppm - How to Use: Use at the end of your skincare routine, morning and night. - Country of Manufacture: Korea