Prenatal's?!

Zerenity • Arizonan.• Living life to the fullest.•Nature addict. ❤️ Sister to a Marine 🇺🇸
I was talking with a roommate tonight, and she said she took prenatal vitamins for her hair, skin and nails to grow and look wonderful. **I am not TTC** I'm just looking for a vitamin(s) that'll help with my energy. I've cut caffeine to a minimum and I'm just trying to change my ways. What brand would you recommend? Do they help your period? What do you like most about the prenatals? 
Thanks!(: