Definite results after 2 weeks. My lashes were weak and falling out. I am not keen on falsies for everyday look so needed a product that will help keep it real. It took me a few days to get used to the routine of remembering to apply the product which I did twice a day. The product is soft and does not have a strong scent so its advisable for hypersensitivity. I’m loving my new natural eyelashes that are much longer and thicker. Amazing product.