Our men's shampoo soap contains butylene glycol, citric acid, and glycerin. It helps to restore your hair's natural colour, reactivate its colour and prevent it from turning grey. It is easy to use: wet the area you want to use the soap set, apply the soap set to your hair or beard and massage it until it lathers, wait for 5 minutes and rinse it off with lukewarm water. After use, it eliminates the accumulation of waste in the hair follicles, unblocks microcirculation in the head, repairs and replenishes the large amount of melanin in the hair follicles, repairs the function of the hair follicles, nourishes the hair follicles, strengthens the hair roots, accelerates the supply of melanin, and the more your hair turns black.