Main and tail

You can use any good shampoo you want. I would stay away from really cheap brands. Don't get paranoid about ingredients. If it was causing cancer and making peoples hair fall out consumers would have complained along time ago and they would have been pulled from the shelf. I used to be paranoid about shampoo ingredients but then I realized it had no foundation and the health food store brands are costlier, doesn't do much and have some of the same ingredients. Those ingredients listed as "bad" sometimes have to be used to preserve the product.