Introducing Control GX + THK Grey Reducing and Thickening Beard Wash from the #1 brand in male hair color. CGX + THK is formulated in a bio-tech lab with healing alpha keratin, previously used for wound healing and muscle regeneration and is now unleashing its transformative power to strengthen men's hair. Control GX + THK is the first smart beard cleaner that washes, reduces greys and thickens all in one! *After 5 applications on hair measured by a technical tool.