Nioxin INTENSIVE DEEP - Density Protective Mask 500 ml3D INTENSIVE deep protect density mask from NIOXIN. The NIOXIN range of products is designed to strengthen, nourish and repair fine hair from the roots. Inspired by skin care to treat fine hair, it treats the 3 symptoms of thinning hair: derma, density, and diameter. Backed by more than 30 years of research, NIOXIN is the most recognized brand for thinning hair in the US It is endorsed by the Institute of Trichologists, the world's leading