For frizz-free hair. Frizz. Fluff. Flyaways. Like it says on the bottle, Keratin Smooth Shampoo cleanses and smoothes, for clean, frizz-free hair. And, like its name says, Keratin Smooth Shampoo is infused with keratin, a fibrous protein found in your hair and a key building block. This means this shampoo especially good if your hair is dry or damaged. Our Quat Complex strengthens strands and helps prevent breakage.