Does Rosemary work for hair?

(Guys, before u bout to type why are u asking this in here and not reddit/quora. I also asked there, it's just there's no reply ,)
Anyway, guys i need oil( for everyday use but I still have not bought one) fro my hair to survive the heat outside/ also helps to make my hair healthy.. I heard rosemary works very well but it also cause hairfall??? Like I don't know anymore, girlies and ladies ( also hot momies). Please advice me. Anything u think is I need to know just throw at me!. (๑•ㅂ•)و✧