Oiling  hair with a mixture of oils like olive, sesame, coconut and castor oil keeps provides moisture to hair and prevent them from drying and breakage. Once in a week apply a good hair mask. She can mix and prepare different types of masks using green tea, olive oil, milk, gooseberry,  etc. Condition  hair using organic Apple Cider Vinegar, Rosemary tea once in a while. You can also start her on zinc and biotin supplements. Consult on private chat for further help.