The Pro-V compound disperses in water and spreads through the shampoo lather as small molecular structures.
As the hair becomes wet and swells, the cuticles become more porous, allowing water to enter easily. At this stage, the water-soluble polymers in the shampoo help deliver Pro-V to the hair strand.
Diffusion of the Pro-V molecules occurs, as the Pro-V moves from the exterior of the hair into the inner core of the hair.
Pro-V is thus delivered deep into the hair shaft, reaching the core and helping to nourish the hair from within.