Our Hollywood Luxury Eyelash Serum can guarantee you 100% that this serum really works! We usually let the product speak for it self, it takes 2-3 days to see growth results. This serum has limited stock and has only been selling for 6 months and is our best seller as product at the store. We highly recommend picking this serum up as a after care to help keep the lashes healthy during/without eyelash extensions. Apply a coat on your lash line and on eyebrows; only once a day at before bed.