Final answer:
A Clarifying shampoo is designed to remove buildup from the hair, including metals, by using complexing agents that bind to metals and make them water-soluble.
Step-by-step explanation:
The type of shampoo that contains an active agent that binds to metals and removes them from the hair is known as a Clarifying shampoo. The purpose of clarifying shampoos is to eliminate the buildup of sebum, product residue, and minerals in the hair. Complexing agents are common ingredients in these shampoos and similar detergents because they can form soluble complexes with metal ions, effectively removing them from the hair. These agents can help mitigate the effects of hard water, which often contains metals that can cling to and dull the hair. Unlike volumizing shampoo, moisturizing shampoo, or color-protecting shampoo, which are formulated to add volume, moisturize, or protect hair color respectively, clarifying shampoos are specifically designed to deeply cleanse the hair and scalp.