Girls/boys would like to leave this comment around here, because I find this product great, I have a lot of gray hair and a mole in the front area that it is only gray that it is always difficult for me to cover and with this shampoo I had all my black hair and it perfectly covered my gray hair from the first application. Tell them that I was dividing my hair into sections as if I were going to give myself a normal dye and I was smearing the dye shampoo as it says in the indications, it is worth emphasizing that I used it only to cover the growth of gray hair and I applied 14 dispensations of the product, Then I started doing chores in the house and my time passed and I had it 1 hour on, after washing my hair also with the shampoo that I usually use, my hair was completely dyed... the shampoo has no unpleasant or strong smell... Now to see how many heavy-headed washes... Then I will leave more comments... I recommend it 100%. .. I hope I helped them. The delivery did take a month and a little longer.