Jojoba oil has not been shown to help grow hair or prevent any hair loss however Jojoba oil is good for dry scalp issues and dandruff as well.
Jojoba Oil can also help nourish the hair overtime due to the Vitamins and minerals that Jojoba Oil is rich in.
So although Jojoba oil cannot really grow hair it can help regrow your hair if used with other hair growth products as the Jojoba oil can help stimulate the hair and nourish the hair at it's roots.