A former hairsylist turned me on to this secret for a cleansing shampoo for color-treated hair. Commercial cleansing shampoos are made to throughly cleanse your hair (ie remove all product build-up), but they also strip color. This homemade version helps to prevent stripping of color, but also throughly cleanses your hair. It is also much cheaper and can be made with products already in your home. I love it and use it once per week!