So zero shampoo is not the answer for me—or most people. The idea that your hair will naturally rebalance after a period of not washing is “an old wives’ tale,” noted Joshua Zeichner, the director of cosmetic and clinical research at Mount Sinai Hospital to me via email. Moreover, it’s not good for your scalp, which does need to be cleansed now and then to stay healthy. “This no-shampoo movement has been a problem,” dermatologist Rebecca Baxt told me. She’s seen an uptick of people coming in with dead skin built up on their scalps, which itches and flakes, and ironically looks kind of dry, which can further feed the no-washing cycle. From a doctor’s perspective, the scalp skin is what you’re really caring for when you wash your hair.
I heard the comedian Dave Hughes on his radio show some time ago say that he doesn't use shampoo very often, and once he got in the shower and was surprised to find that his hair was bubbling under the shower, when he hadn't put anything on it. Turned out his wife had told one of his kids to secretly drop some shampoo into his hair while playing with him, so that he would finally wash his hair properly.
Since then, when I have seen him on TV, I have thought "yeah, this guy's hair does look kind of stiff and as if it needs a good wash." I wonder how many other people who follow this idea I could detect as having not-so-nice looking hair.
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