The Buildup Myth
Whatever shampoo you use, you don't need to switch periodically in order to prevent "buildup." That's a myth, Acord and O'Brien say.
"The products are so good now that you aren't going to get a product buildup unless you're a crazy hairspray person, which is not how hair has been styled for the last 15-20 years," O'Brien says.
The best way to pick the right shampoo for you: Ask a stylist. "A runner shouldn't pick the right shoes based on what color they are," O'Brien says. "They should go to a running specialty store and get fitted for the best shoe. It's the same with shampoo. Don't pick your shampoo based on what your friend likes or because you like the fragrance. Get a recommendation from a stylist that knows your hair."