I have multiple chemical sensitivity syndrome that has become worse as I get older. Newsprint, anything to do with fragrance, rubber or vinyl, solvents of any kind, new paint and carpet, on and on... these make me feel ill. I imagine there are some reading this review who can relate to my experience. A few years ago "regular" shampoo began causing me allergic reactions, no matter how "natural" the product claimed to be. THIS STUFF IS AWESOME! Deeply conditions with only a small quantity, lets me slip a comb through my long curly hair. Really great.