Check the ingredients listed on your shampoo bottle, and see if they have a substance by the name of Sodium Laureth Sulfate, or simply SLS. This substance is found in most shampoos, and the manufacturers use it because it produces a lot of foam and it is cheap.
BUT the fact is that SLS is used to scrub garage floors, and it is very strong!!! It is also proven that it can cause CANCER in the long run!!!! *imagine you are cleaning your hair with those detergent* :S
