WHAT TO EXPECT AFTER 4 WEEKS
In 4 weeks, skin looks firmer, smoother and younger. Skin texture improved by 76.41%
*As a result of the clinical trials from Dermacosmetic Skin Science Laboratory Co., Ltd.
In just 4 weeks, pigmentation
improved by 16.5%
Start by clicking on the "JOIN THE CHALLENGE" button. Submit your “Before” photo, get the Cosrx Brightening Booster Duo and begin using them as part of your morning skincare routine. Use the Peptide Booster Serum again at night. After 4 weeks, submit your “After” photo to claim your results and reward.
Yes! For the best results, use the Peptide Booster Serum followed by the Vitamin C23 Serum in the morning in your AM routine. The Peptide Booster should also be used in your night routine. Please do not skip sunscreen in the morning.
Absolutely! Both serums are designed to be gentle yet effective for all skin types, including sensitive skin.
Consistency is key! We recommend using both serums daily for 4 weeks. Visible improvements will be noticeable by the end of the challenge.
For the best results, we suggest sticking to the routine as consistently as possible. But don’t worry, missed days won’t completely derail your progress. Just get back on track the next day!
Once you submit your “After” photo at the end of 4 weeks, you’ll receive 15% off your next COSRX purchase.
Yes, the challenge is designed around using the Peptide Booster Serum and Vitamin C23 Serum together for optimal results. These two products work synergistically to give your skin the ultimate anti-pollution care. The duo is at 20% off for the challengers (limited time only).
