Folic acid with iron can promote the overall growth of hair. But folic acid and iron should not be taken in excess without medical supervision. Along with including iron and folic acid rich foods in diet you can also choose natural plant based supplements containing these 2 in the form of gummy as they contain iron and folic acid in required quantity for the day. If you are looking for healthy option without exceeding the daily requirement you can choose Health etc hair gummy that is formulated with these nutrients that are sourced from plants and also contains other nutrients essential for hair growth like biotin which is also of plant origin.