Polygonum multiflorum, rehmannia root, angelica root, and other medicines can indeed prevent hair loss and cultivate hair roots. When you soak it in water and drink it, you can only absorb the surface effects. If you want to absorb the deep effects at the same time, It is recommended that you stew it over low heat for one hour. If it is inconvenient for you to stew it, you can cut it into small pieces and soak it! This way the medicine can be sucked out more! ◎