- This Oil Control Grey Hair Cover Shampoo is a natural hair darkening shampoo that restores your hair's natural color and luster. - The shampoo is made with polygonum soap, which is a natural herb that has been used for centuries to darken hair. - It is gentle on your hair and scalp, and it does not contain any harsh chemicals or dyes. - The shampoo is easy to use. Simply apply it to your hair and massage it in. Leave it in for 10-15 minutes, then rinse it out. - You will start to see results after just a few uses. Your hair will become darker and more vibrant, and it will look and feel healthier. - The shampoo is perfect for people who want to cover up their grey hair without using harsh chemicals or dyes. It is also a great option for people who want to restore their hair's natural color and luster.