Collistar Revitalizing Vitamin C Shampoo gives brightness, radiance and strength to dyed and dull hair. An ideal blend of ingredients to enhance the natural shine of hair and protect the color from washing out and fading. The basis of the formula: panthenol (provitamin B5) — seals weakened hair, smoothes, increases the diameter of each hair; vitamin C — supports the healthy state of the hair structure, prevents breakage; extract of yellow mullein flowers – fills hair with strength and radiance, protects from ultraviolet radiation.