All Eyes on You Lash & Brow Enhancing Serum is clinically tested and proven to enhance longer, fuller, bolder lashes in 6 weeks. Daily use of this product is essential for maximum results. This product conditions and works while you sleep, to provide a foundation of healthy lashes and brows. Clinical tests showed an average improvement of 46% longer-looking lashes in 6 weeks. 100% of women in clinical study noticed improvement in just 2 weeks. May be used with lash extensions.