How long is your hair?

So my daughter is 3.6 years old and her hair grows like and inch a year. And she takes vitamins, ive been putting coconut oul in her hair but her hair is still dosent look like its growing at all. What kinda hair proucts or vitamins do u guys recommend so her hair can maybe grow!?!?

Quick question about vitamins. Would kids vitamins work as a pregnancy vitamins lol?

I wish my hair was thin . I have thick wavy hair.

I want to know what kind of vitamins do work to grow hair because i been trying to grow my hair out for 4 years and nothing its still the same length so what do i need to do to grow my hair out ?