Any suggestions on good hair product for volume or to make hair have more thickness in appearance?

I've tried several products, but they always make my hair greasy. My hair used to be pretty full, but I stopped BC pills (my md suggested the hormones changed my hair), and several months later have found my hair to be fine and flat. I'm up for new suggestions. Thanks!Any suggestions on good hair product for volume or to make hair have more thickness in appearance?
Try Big Sexy Hair. most salons carry it. Also i use this product called Thick E that makes my hair look fuller and healthier. i get it all from my hair salons. Big Sexy Hair is the best volumizer i have ever used.