I would like to strongly recommend that you use hair treatments as well. Since hair is constantly irritated and damaged by sunlight, hair dryers, dyeing, and perms, providing nourishment through treatments replenishes protein and helps maintain a voluminous hairstyle. When protein, the main component of hair, is lost, the hair loses its strength, creating an environment where it is prone to falling out.
If you have an oily scalp, pre-washing (double shampooing) may be helpful. If you rinse off the sebum once and shampoo a second time, you can feel a difference in the amount of lather and the sound of the foam, and it can leave your scalp feeling more refreshed.