I think this is true. Shampoo has always made my scalp itchy and dry, and some conditioners have made the skin on my forehead and back break out. For the last week, I have been using a liquid castille soap on my hair and no conditioner. I also use, as a final rinse, a pitcher of water with a couple tablespoons of distilled vinegar added. My hair has never looked better. Last night I even told my husband that I think shampoo is bad for our hair, and today I decided to do some research on the internet. If you don't believe me, try it for yourself and see.