I used this ANAZE shampoo on my dark, bleached hair after color removal. The instructions say to use it 2-3 times a week, but I kept my color by using it just once or twice a week. I’ve since bleached and colored my hair again, but unlike other toning shampoos, this one really shows color well and the red doesn’t fade easily, even after bleaching again—the base stays pretty dark. I love the product, but I’m a bit tired of red, so I’m planning to repurchase in silver or purple. For reference, with thick, long hair like mine (as shown in the photo), using it 1-2 times a week should last about three months!