OK so i have thiss friend...?

she kinda smells bad and she gets made fun of for it and i feel really bad because she does everything right- wheres deoterant, takes good showers every morning, eats normal foods. and so i odnt know wut advise to give her if she does everything right? she smells like weird and like b.o. . what can she do to smell good other than perfume. ill tell her all the tips