REPLENIX Caffeine Fortified Calming Serum is scientifically formulated to be ultra-calming to the skin. This advanced serum is fortified with medical-grade Caffeine USP and our proprietary Green Tea Polyphenol Technology to provide a powerful dose of antioxidants while visibly reducing redness. Skin feels cool and calm as itu2019s infused with moisture while skinu2019s barrier is protected from damaging free radicals.