The Redken acidic bonding concentrate collection has been in my routine since I was a blonde! It’s still just as important to my routine now that my hair is relaxed. I’ve tried a lot of bond repair collections, and this is easily one of the best on the market. While I don’t use the leave-in conditioner much these days, the shampoo, conditioner and 5 minute mask are must haves for chemically treated hair. LTKBeauty LTKFindsUnder50