Visibly enhance your natural lashes with ultra-nourishing and performance-based ingredients like Biotin and Amino Acids – with real results starting after just 4 weeks of nightly use! Our #1 best-seller for a reason, the Essential Lash Serum delivers noticeable lash improvement and can be used with or without falsies to help retain lashes over time.You will see results within 2-4 weeks and achieve optimal results within 6-8 weeks. Non-irritating growth serum