Unfortunately, despite this dubious award it is still used as the principle ingredient in several leading shampoos including baby shampoos. Cocamidopropyl Betaine is used as a foam booster in shampoos and liquid soaps. It is a medium strength surfactant also used in cosmetics as an emulsifying agent and thickener. As consumers, we expect our shampoos and cleansers to be rich, thick and foamy and so some manufacturers add these ingredients simply to meet that expectation. Check the label of any of your existing products to see if they contain Cocamidopropyl Betaine as an ingredient.