does rosemary oil actually thicken hair?

[thegeneral3]

im 17 and have kind of thin wavy hair. my hair isn't too bad yet but is looking like its starting to thin and stuff on front, mainly on the right front side, and i'd rather do something about this now whilst i'm still 17 and get it nice and thick rather than waiting till my hair is really thin.
i'm asking about rosemary oil because i've done a bit of research and i heard that rosemary oil in your hair is best for 18s and under, and i've heard that minoxidil and finasteride should only be used by 18+.
if anyone has any experience with rosemary oil, what measurement of doses did you take and how often did you take them, and also where is the most reliable and safe place to buy from, and also should i use any other oils along with rosemary oil? does rosemary oil even work or is it just cope like ive heard?
also if anyone used minoxidil around my age did it work well or nah, cos i've seen lots of comments on videos about minoxidil saying stuff like "don't use it because it gave me these side effects" such as bad rashes, swelling and other stuff. does anyone know if these side effects are real?

 

[gymcelld]

You will get far greater results minoxidil