I have not used shampoo for the past 10 days. The only thing I've noticed so far is that it is apparent the days I don't rinse my hair with water. But when I do, I don't notice any difference from when I shampooed. Disclaimer: I'm a man with short hair, so people with longer hair may have a different experience. » 4/14/13 10:20am 4/14/13 10:20am