Um yea, I read my post. Unless you're referring to some grammatical errors, I still stand by it.
There's a belief that over-shampooing your hair, or using a more 'harsh' shampoo strips your hair of 'essential' oils it needs. As I said in my earlier post, there was a study which showed even if you use ether, which strips the hair of all oils, the hair remains healthy.
A.M. Kligman, K.J. McGinley, and J.J. Leyden, from the book Hair Research
"The sequestration of sebum between cuticle cells is a biologically sound device to assure that there will always be a small amount of lipid to protect the fiber from environmental assaults, including highly efficient shampoos. There would appear to be little ground for fearing that the surfactants will do their job too well, leaving the hair "squeaky clean." The formulator does not need to worry that he may be creating surfactant systems that remove more oil than soil. In our studies, even after the two cycle ether extraction of the scalp, the hair was neither dry nor squeeky. Indeed, it was suprisingly pleasing with a high lustre and an agreeable feel."