I never used to color my hair. Despite some gray hair on my head, my hair was completely healthy. I used this product on the advice of a friend. My scalp got burnt because of this product. As soon as I applied color to my hair. My head started itching. I immediately washed my hair with shampoo on my scalp. My scalp and hair got burnt. Now I will never use this product again. According to me you should never use this product.