Eyelashes have a 120 day cycle. 90 days eyelashes are in the dormant cycle. 30 days eyelashes are in the growth cycle. Since nobody can know what the state of the eyelashes are in we recommend to use the eyelash serum twice a day for 2 weeks and then 1 time a day for at least 120 days to see best results. Our eyelash serum is 8ml therefore can last 2-3 month. Go get yours before its sold out. We love our nuorganic family💚🤩