Go sulfate-free.
Credit: Johnny Hernandez / Getty Images

What's wrong with that $3 bottle of supermarket shampoo? Although economical, it's most likely packed with harsh chemicals known as sulfates, which show up on ingredient labels as "sodium lauryl sulfate," "sodium laureth sulfate," and "sodium lauryl esther sulfate." While these detergents help make products sudsy, they also deprive your hair of its healthy oil, leaving it dry, brittle, and difficult to manage. To avoid these effects, look for a low-sulfate or sulfate-free shampoo, which cleans without removing oil. Sulfate-free shampoos can be difficult to find in drugstores, so ask your barber for a suggestion, or personalize your product with our list in the last slide.