The Alpecin PowerGrey Shampoo contains intensive purple pigments that neutralise the yellow hue with each hair wash. The result: A great-looking shade of grey. Medium-grey hair looks even darker and fuller. In addition, the PowerGrey Shampoo from Alpecin contains a powerful caffeine complex. When you wash your hair each day it activates fatigued hair roots, strengthens hair growth and prevents hereditary hair loss – simply during your daily hair wash.