Does the mother have the right to stop her daughter fasting because of nutrition?
Question

                Is it the mother’s right to stop her daughter from observing voluntary fasts, naming nutrition as the reason? Is it permissible for the daughter in this situation to fast despite her mother’s objections?
Praise be to Allah.
    The parents have the right to prevent their child – be it a 
    son or a daughter – from observing voluntary acts of worship, whether they 
    are Hajj, fasting, jihad or others, especially if the parents think that 
    doing this voluntary action will be harmful to the child, or if the parents 
    have some need that cannot be met otherwise. But in the case of obligatory 
    duties they have no such right. If the child is prevented by his parents 
    from observing a voluntary act of worship, then Allaah will reward him.