Regenium-XY technology. Before using Daily Thickening Shampoo: As hair begins to thin, it loses fullness and manageability. After using Daily Thickening Shampoo: Fine/thinning hair is fortified for added body and fullness. Recommended by the hair experts at L'Oreal. Fortifies hair from root to end for thicker hair. Provides greater scalp coverage. Adds body.