Perfect choice for: Fine-to-normal hair types that crave a fuller figure. Here’s how: Apply to wet hair; work into a sudsy lather; rinse (and repeat if necessary). The inside secret: It’s a well-known fact that bodybuilders love their oatmeal. We do, too, which is why we’ve stocked this shampoo with Oat Protein Complex, designed to thicken each individual strand, provide gloss and shine, and deliver a dose of natural humectants that lock in moisture. Our Bio-Advanced Peptide Complex does the rest of the workout, by reconstructing damaged hair from the inside out.