Alpecin - Try Alpecin Tuning Shampoo if you would like to keep your hair look darker and fuller. The formula is very gentle that you don't need to worry it will stain
I found the best shampoo for men - Alpecin Tuning Shampoo, and here is why - Alvinology
Alpecin Tuning Shampoo - 200ml | HIGH STREET PAKISTAN
Alpecin Test und Vergleich 2023 | WELT.de
Alpecin Tuning-Shampoo - 1 x 200 ml - Das schwarze Coffein-Shampoo für graue Haare | Kräftige Farbpigmente halten dunkle Haare dunkel : Amazon.de: Kosmetik, Parfüms & Hautpflege