8 Crazy but True Facts About Shampoo

"Lather, rinse, repeat" may be more fable than fact, but flawed instructions aside, shampoo is and has been one of the non-negotiables in our beauty routines since before we even had beauty routines. So, we thought it deserved a closer look. Scroll through for eight crazy but true facts about shampoo!

Which of these facts surprised you the most? Tell us below!