Day Defenderᴿˣ

Day Defenderᴿˣ is designed to be part of your daytime routine, promoting brighter, more even-looking skin while defending against environmental stressors your skin encounters throughout the day. Use Day Defenderᴿˣ in the morning as prescribed by your medical provider. Apply a thin layer to freshly cleansed skin on your face and neck, then follow with moisturizer and sunscreen.

Yes. Day Defenderᴿˣ is designed to be used with sunscreen.

Day Defenderᴿˣ is a prescription antioxidant treatment that helps defend against oxidative stress caused by UV exposure, pollution, and other environmental stressors. Sunscreen helps protect your skin from UV rays.

Together, they help provide more comprehensive daytime protection while supporting brighter, more even-looking skin over time. Apply Day Defenderᴿˣ in the morning, followed by moisturizer if needed, and finish with sunscreen as the final step in your morning routine.

Through what we call “guaranteed potency,” we have gone through rigorous potency testing to confirm that Day Defenderᴿˣ maintains an effective amount of stable vitamin C through its beyond-use date. 

Pure vitamin C (L-ascorbic acid) is one of the most effective forms of vitamin C, but it also presents formulation challenges. When exposed to air, light, and water, it naturally begins to oxidize, which can reduce its effectiveness over time.

To help minimize oxidation and preserve the stability of its vitamin C, Day Defenderᴿˣ is specially formulated and packaged in an airless bottle.

You may notice a gradual yellow tint develop over time, and that is expected. Our potency testing confirms that Day Defenderᴿˣ continues to maintain an effective amount of active vitamin C, so you can feel confident you’re still getting the antioxidant protection your skin needs.

Traditional vitamin C serums are usually one-size-fits-all. Day Defenderᴿˣ is personalized and powered by a customizable level of vitamin C plus three antioxidants with Guaranteed Potency.

Day Defenderᴿˣ uses L-ascorbic acid, the most bioactive form of vitamin C, rather than derivative forms used in other formulas. Your medical provider can help determine what formula makes sense for your skin, your goals, and your skin tolerance.

Yes. Day Defenderᴿˣ contains vitamin C and is designed to be used with Night Renewᴿˣ, which may contain tretinoin.*

Day Defenderᴿˣ and Night Renewᴿˣ are designed to work together as the Collagen Building Duo, providing complementary day-to-night support for firmer, healthier-looking skin. The two treatments are used at different times of day, allowing each to play a distinct role in your routine. In the morning, Day Defenderᴿˣ helps defend against environmental stressors while supporting collagen synthesis. In the evening, Night Renewᴿˣ supports skin renewal and helps promote collagen production while you sleep. 
 *Subject to medical consultation. Not all Night Renewᴿˣ formulas contain tretinoin.

Day Defenderᴿˣ is paraben-free, dye-free, fragrance-free, cruelty-free and Leaping Bunny–certified.