I have small nails, and no matter how hard I try growing them long, they tend to go weak, and I have to cut them short again. Nonetheless, I have starting massaging my nail cuticles with olive oil, as my granny advised that it makes nail healthy, and it grows fast. I was taking vitamin A supplements for long, but it didnât help me either, therefore, I would like to know about some appropriate vitamin supplements, from a beauty expert, which promotes nail growth, and keeps them long and shiny. Do you think biotin can help? Please advice appropriately, as I am 17 years old now, and I really want to get my dream nails at the earliest possible! Thanks.