There are two bottles of lash supplements in the Dr Lash Ampule set. One is called Lash Protection and one is called Lash Renew.
1)
Lash Protection: This one is for day use. You can apply it on your lashes before applying your mascara. It helps strengthen your lashes and protect them.
2)
Lash Renew: This is for night use. Apply it before you go to bed at night. It helps your lashes to grow and lengthen over time.
Hope it helps ^^