Dr. Wolff Alpecin Grey Attack Caffeine & Color Shampoo is an anti grey shampoo for men designed to gradually darken grey hair while keeping the result natural looking and discreet. It is made for men who want to reduce the appearance of grey hair step by step during their regular shower routine without using a separate hair colour product. The formula uses an innovative patent pending repigmentation technology with 5,6 DHI, listed as dihydroxyindole, which accumulates in the hair during washing and reacts with oxygen in the air to form colour pigments, so the hair gradually appears darker and the colour effect grows out with the hair. It also contains Alpecin’s caffeine complex with caffeine, zinc PCA, and niacinamide to support natural hair growth and give the hair more grip for easier styling without softening silicones. Panthenol supports hair care and smoothness, menthol gives a fresh scalp sensation, and cleansing agents remove daily build up while helping the active ingredients work during application. With daily use in the first few weeks, visible colour results may appear after 2 to 4 weeks, and once the desired shade is achieved, the application frequency can be reduced or alternated with a normal shampoo to maintain the colour tone. It is suitable for any hair colour but works best on light brown to black hair.