About two years ago, I listened to an Englishman talk about NOT using Shampoo.  He said that if one washed one's hair in just water, after 6 weeks, all the NATURAL oils would come back.  His reasoning: you wash all the oils out of your hair along with the dirt, and then put the oils back in with Conditioner. It was a great marketing ploy!  If you just wash with water, you are removing any dirt, and leaving the good oils in.  It works!  I have not used shampoos for 2 years, and I'm always getting comments on how good my hair looks. My head doesn't itch and there is no dandruff.  Think of all the money I have saved, to say nothing about being chemical-free!  Try it.  It truly works.