Hair takes a beating in the modern world, being vulnerable to damage by chlorine, dyes, dirt, dust, wind, and over-exposure to sun. Factor in the effects of aging, and anyone’s hair can quickly become brittle or thin. If you are struggling to maintain your prized tresses, maybe it’s time to reevaluate shampoo type. Today’s hair-care products are as varied as the folks who use them, and making the right choice is often a matter of trial and error. Here are three popular shampoos to consider, each aimed at a different hair type.