Essopi Retinol Treatment Serum 10X contains a large amount of retinol so it is best for mature skin types who have already used retinol products. This ingredient increases cell turnover, which encourages soft and smooth skin. Hyaluronic acid binds moisture to the cells for a plumped look and helps prevent the dryness and irritation that is often caused by retinol products. Green tea polyphenols work as antioxidants to guard against free radical damage. This anti-wrinkle serum also contains caffeine that not only improves the serums antioxidant properties, but also revitalizes the complexion to create a fresh and vibrant look.