Suggest Remedy To Strengthen Hair And Improve Growth

hello. i am shipra. actually i have a question regarding the dermatology section. i have really weak and thin hair which doesnt grow beyond a fixed length. i cur hair after like 6mnths evn till then nthn beynd d limit. i was thnkn f goin for permannent hair straightening but i feel i should make my hair stronger and thicker before thinking of anything like this. please suggest me wat can i apply on my hair to improve fast.i am taking medications for my acne so can only apply on my hair rather than eating doses. please suggest me something that is actually effective. my email id is YYYY@YYYY suggest