Im having problems with my Hair?

im only 13 and im lossing hair help!! can i grow back my hair healthier and stronger is there any vitamins that i can take
my mum has only a little bit of hair could it be the genes
i also straighten my hair but not like everyday just like 1-3 times a day
PLEASE CAN YOU HELP!!
Update: I mean 1-3 times a week
3 answers