VICVINUEL Advanced lash serum uses a scientific, natural formula to help lashes to grow longer, thicker, and healthier. It also works as eyebrow growth serum. Use this lash/eyebrow growth serum twice a day, and you’ll see visible results within just 2 weeks. After 60 days, the length of your eyelashes will increase by 31.4%, their thickness by 6.8%, and their quantity by 36.7%.